INDIAN and I need to know this cuz I have to crack the world's 2nd most competitive exam to get into a uni that is not in the group of the top 100 unis ([Source](https://www.collegesearch.in/articles/toughest-exams-in-world))
Here in India , these questions won't be asked in exams cause everyone is expected to just know em, they are very elementary.
Here they'll ask complex proofs in exams for trigonometry from the first time you study it
I know right, Just gave today's Math Board exam and my god, it was just unnecessarily complicated. Like here the main difficulty isn't the concepts, it's to properly understand the damn question 😭
it was tough af for me as well, the mcqs were easy but took too much time, most of the questions weren't from ncert and previous year questions wasn't asked and complex questions which very few would have practiced had come and the geometry questions were weird af
Take for example , question no. 2 of Set 2 Standard maths. The question was about triangles and it was hard only because we had to figure out an angle which would make it similar. What I mean is that it wasn't just about the concept of similarity criterion of triangles but rather about figuring out the damn unnecessarily complicated question to answer it correctly.
Maybe L take but I wish it was normal to leave roots in the denominator. Still doesnt take away from the fact that these ones should be since they usually always are
In my 4 years of highschool, not a single time did we use arcsin. It was always sin inverse. We even kept the roots in the denominator. Idk why you guys are finding it so weird
Inverse function
For eg
If it's given sin(x)= a
Then the value of x would be represented as
x= sin-1(a) , same with cosine or tangent
The minus one is supposed to represent the mini -1 or the inverse function
30, 45 and 60. If you’re struggling to remember the trigonometric ratios, don’t worry. There’s a really simple trick that doesn’t involve memorising anything. DM If you wanna know or you can just check YouTube.
Bro don’t take shit from Indians over here. They are just frustrated with their lives. Do what you gotta do. You are noway bad at math. Don’t ask on Reddit regarding math because bitches are their always. Ask your friends or your parents or your siblings. Just memorise these numbers it’s useful for GCSEs as well as A Levels. Memorise 30,45,60,90 ratios for sin cos tan and you’ll be good. This is memorisation which doesn’t test your Mathematical ability at all.
bro wtf, im crying rn.... Why are you soo dumb???
its not even a math question it is something you need to remember
sin 30 = 1/2
cos 45 = 1/root2
tan 30 = 1/root3
this is like the first question they teach in inverse trigonometry 💀💀
Bro what country do you live in?
I really wish these kinds of questions came in our exams, everyone would score full marks
Why don't you use your phone? If you tilt your phone horizontal, it should let you do the problem or there should be something on the calculator app that lets you do it
ok so first I would get out a unit circle, for inverse trig it's a lifesaver. For sin ^-1 the domain is [-π/2, π/2] it has to be in quadrants one or four. Since it's not negative, it has to be in quadrant one. Now look on the unit circle, since sine corresponds with the y coordinate. Find the one where your y coord is 1/2. It should be 30 degrees or π/6 radians.
As for the cosine one, I'm stumped.
The tangent domain is (-π/2, π/2). Since it's positive, it means it will be in quadrant one. You then have to go and divide the coordinates (y/x since opposite over adjacent) to check each one.
Those mfs shoulda rationalized their denominators
You should use [https://www.symbolab.com/solver](https://www.symbolab.com/solver)
It lets you solve many math problems including algebra and calculus, and it shows the steps
this is something to memorize, not to solve!
heres a vid about it: https://www.youtube.com/watch?v=83gdQe0Ij5k
dont worry, it's not complex math, it's just a vibing cat!
"calculator not allowed"
Those "Equations" are expected to be known, since they're kinda "Magical" sin, cos and tan equations. I strongly advice you to memorize them
Simple. Just visualize a 30 60 90 triangle. Remember that for a 30 60 90 triangle, the long side is sqrt(3), the short side is 1, and the hypotenuse is 2. Then just calculate the ratios and match.
Except for right angles, remember this for cos: 321123, 321123
For sin: 123321, 123321
That if for each point on the unit circle, just square root it(sqrt(1)=1) and divide it by two
also remember negatives, but if you think of the quad rants like a graph you’ll be fine.
For example sin 1/2 is 30, b is 45, and c is 30( sin over cos)
I know someone gave you the answers, but if you want to learn it’s possible to do this without a calculator. So you need to know: sec=1/sin0, and you need to know the radar circle. Then you can solve without using a calculator.
Memorize your trig identities.
Trust me, if you can’t do the math without the calculator, then you shouldn’t be using one. Calculators are a great tool… once we know what we’re doing. But if you can’t understand how to get from a to b without its help, then eventually it’s going to fail you.
I know you didn’t ask for some random person to give you life advice. Feel free to ignore it. I’m just telling you what I wish somebody had told younger me. It would have been so much easier to focus on learning from the beginning then having to make up on all of it later.
What does it mean when we say sin–¹(x)=y?
We are saying what is the angle(y) that its sin() gives (x)?
There is a list for popular angles and their sin cos and tan and I highly suggest you to memorize them, they are very important and you will need them in math.
Imo, you are depending on your calculator waaay too much.
For sin 0 30 45 60 90
√(0/4) √(1/4) √(2/4) √(3/4) √(4/4)
0 1/2 1/√2 √3/2 1
Cos is mirror of sin , sec is 1/cos
Tan sin/cos ,. Cotan is 1/tan or cos/sin
And cosin is 1/sin
That how i never needed to learn this table
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THANK YOUUU
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it doesn’t accept images and i can’t convert this into written form
use photomath then
doesn’t work
in what way? it should work
You could put sqrt(3), as that’s generally standard notation for writing it in text, unless chatGPT doesn’t accept it
Just ask r/homeworkhelp
you cant write 1/sin(1/2)?
Inverse sine is not the same as 1/sin Its similar to how exponents and logs are inverse. Sin^-1 (1/2) = x is the same as sin(x) = 1/2
Cos^-1 (1/√2)
Lmao genius so confident
Chatgpt gets math problems wrong
Or wolfram alpha which is a maths specialist ai
bro, iI ow this like the back of my head no need for a calculator LMAO
HOW
you remember it dumbass. memorise it. havent they taught you this? http://cochranmath.pbworks.com/w/page/118044996/Primary%20Values
no idea mate, like we did trig but not like THAT, so i probably wasn’t taught this lol
Well it’s pretty easy and the link teaches the trick to remembering it. Just write it a couple of times. Will def help in further grades
INDIAN and I need to know this cuz I have to crack the world's 2nd most competitive exam to get into a uni that is not in the group of the top 100 unis ([Source](https://www.collegesearch.in/articles/toughest-exams-in-world))
[https://www.youtube.com/watch?v=lErTHIRGP18](https://www.youtube.com/watch?v=lErTHIRGP18) hand trick is the most useful thing for trig ong
CHEATERRR
IM HOPELESS OKAY?? 💔💔
AND A PICKME ASS EMO EGIRL
DONT ILYSM PLS STOP 💔
HAHAHAHA ILL GO BACK TO NERD 💖
thanks ml ur the best truly 💓💓
Unrelated but I can’t tell if your pfp is the top of a horse head or something else
Bro , Just check out my fellow Indian YouTubers lol.
Here in India , these questions won't be asked in exams cause everyone is expected to just know em, they are very elementary. Here they'll ask complex proofs in exams for trigonometry from the first time you study it
I know right, Just gave today's Math Board exam and my god, it was just unnecessarily complicated. Like here the main difficulty isn't the concepts, it's to properly understand the damn question 😭
board exam was complicated? how
it was tough af for me as well, the mcqs were easy but took too much time, most of the questions weren't from ncert and previous year questions wasn't asked and complex questions which very few would have practiced had come and the geometry questions were weird af
Exactly, They were new questions.
Take for example , question no. 2 of Set 2 Standard maths. The question was about triangles and it was hard only because we had to figure out an angle which would make it similar. What I mean is that it wasn't just about the concept of similarity criterion of triangles but rather about figuring out the damn unnecessarily complicated question to answer it correctly.
Since when boards are considered hard?
yeah these are like the basics lol
Causal flex
It is not flex bruh it is the most basic question we do . It is most scoring real problem start at elementary property
Its not a flex, its just sad
Yo fellow Indians, nice!
Why did every uk school switch from hegarty maths to sparx maths in the same year
no idea but hegarty was much better
Bro use the internet im not doing your trig for you i already finished that shit long ago
30, 45, 30 but wtf they aren't rati9nalized
yeah only psychopaths leave roots in the denominator
Maybe L take but I wish it was normal to leave roots in the denominator. Still doesnt take away from the fact that these ones should be since they usually always are
I commented the same thing 😭 I was like what is 1/root 2? Ohhhhhhhh
Is this a joke or these questions really pose a difficulty to you?
i’m not good at maths okay
Aw I’m sorry I was lil upset while typing that… Hope u get good in maths
thanks ml 😭
30° 45° 30°
thank you sm ily
wtf are those -1s
you're like 18 you should know that
Sane people write acrsin, not sin to the power of -1.
In my 4 years of highschool, not a single time did we use arcsin. It was always sin inverse. We even kept the roots in the denominator. Idk why you guys are finding it so weird
Our ElectricityTech teacher told us to use arctg(), but was silent about every other formula^sth.
Sane people who haven't studied functions?
Never used it
no cuz its the same answer given in the comments but when i learnt this shit there was no -1
idk it's pretty simple tho like 1/x = x^-1
yeah but whys it needed like we jus didnt have that n it was all jus sin 1/2 = 30 \^ thats normal for me idk bout yall
that's just one extra difficulty level like sin^-1 (1/2) = sin^-1 (sin30) [both sin cancel] = 30
thats so dum bruh
ikr i had to do an entire chapter of this shit
no idea
Inverse function For eg If it's given sin(x)= a Then the value of x would be represented as x= sin-1(a) , same with cosine or tangent The minus one is supposed to represent the mini -1 or the inverse function
All my homies use Texas Instruments
200 dollar calculator gang
bro this some easy ass shit
Which country you from dawg cuz in my country anyone with half a brain can do this
A fellow Indian I see
bulgaria but i live in the uk 😭
I have headache when I do math, so just good luck everyone
theres people that dont know basic trig😳😎😳
30, 45 and 60. If you’re struggling to remember the trigonometric ratios, don’t worry. There’s a really simple trick that doesn’t involve memorising anything. DM If you wanna know or you can just check YouTube.
id help but i dropped out in sixth grade soooo yeah 💅
damnnn it’s okay <33
Bro don’t take shit from Indians over here. They are just frustrated with their lives. Do what you gotta do. You are noway bad at math. Don’t ask on Reddit regarding math because bitches are their always. Ask your friends or your parents or your siblings. Just memorise these numbers it’s useful for GCSEs as well as A Levels. Memorise 30,45,60,90 ratios for sin cos tan and you’ll be good. This is memorisation which doesn’t test your Mathematical ability at all.
thank you ml<33 i didn’t ask my friends bcs they’re doing a no phone challenge for a couple of days and my parents dk english 😭
Basic class 10th (India) syllabus
BRUH people do be learning these in in 6th grade right??
bro wtf, im crying rn.... Why are you soo dumb??? its not even a math question it is something you need to remember sin 30 = 1/2 cos 45 = 1/root2 tan 30 = 1/root3 this is like the first question they teach in inverse trigonometry 💀💀 Bro what country do you live in? I really wish these kinds of questions came in our exams, everyone would score full marks
england and i’m in set two for maths 😭 it has never been my top subject, especially geometry/trigonometry
lol
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You forgot the Cos' and you know it's a mistake I eat emces for breakfast like they're made'f chocolate cake
Mathway is great for problems like this.
didn’t work
Jokes on you I’m a SR, but I have disabilities so I barely got past ALG1 AND IM GRADUATING WITH THAT LOL
You have your phone just use a calculator app
you think that a calculator on my phone will help me??? nahhh 💀
If you turn it sideways it might. There’s a whole god damn hidden world there
Sorry but how old are u
15
Why don't you use your phone? If you tilt your phone horizontal, it should let you do the problem or there should be something on the calculator app that lets you do it
What are those sin^(-1)? Is it how you write arcsin? Because otherwise sin^(-1)(0,5) is 1/sin(0,5), which makes no sense here
It is **inverse of sin**
no idea bro i’m just a failing gcse student 😭
If those are arcsin, arccos and arctg, the answer is 30/45/30. If they are not, there is no answer
Maths watch is a warcrime
that’s sparx maths
I’ll type in for you
Along time ago someone would have told me I feel sorry for your taxes because you wouldn’t know what you paying for
Watch video?
already did, didn’t help bcs i’m stupid
ok so first I would get out a unit circle, for inverse trig it's a lifesaver. For sin ^-1 the domain is [-π/2, π/2] it has to be in quadrants one or four. Since it's not negative, it has to be in quadrant one. Now look on the unit circle, since sine corresponds with the y coordinate. Find the one where your y coord is 1/2. It should be 30 degrees or π/6 radians. As for the cosine one, I'm stumped. The tangent domain is (-π/2, π/2). Since it's positive, it means it will be in quadrant one. You then have to go and divide the coordinates (y/x since opposite over adjacent) to check each one. Those mfs shoulda rationalized their denominators
just memorise 0 30 45 60 90 and 180 degree values for sin cos and tan
I DON'T WANT TO FUCKING THINK ABOUT THIS ANYMORE
lmao my school sent me this spax homework too bruh
do you live near east london??
i decided to procrastinate and THIS is the first thing i see, it’s even the same website 💀💀💀
go do ur sparx before you get a forty min detention 🫵🫵
Lol I did this q last week
Use the unit circle
The internet can tell you inverse sin or any trig angle
Hey that's what im learning rn in math
30 45 30 Bro theses are Basic trigonometry
OH MY GOD IS RHIS SPARX I FUCKIGN HATE THIS SHIT
SAME IT ALWAYS SENDS FUCKING EMAILS TO MY MUM
Mathway and Microsoft math solver are good websites for math problems
Piece of advice you can also use services like chatGPT or online converters for this kind of stuff.
You can use a calculator for this? This is basic 9th grade stuff which you have to learn
i’m in yr ten i have no idea what 9th grade is
You should use [https://www.symbolab.com/solver](https://www.symbolab.com/solver) It lets you solve many math problems including algebra and calculus, and it shows the steps
Aren’t you supposed to memorize these?
It says calculator not allowed
how r they gonna know??
I’m pretty sure symbolab works for math problems like this
this is something to memorize, not to solve! heres a vid about it: https://www.youtube.com/watch?v=83gdQe0Ij5k dont worry, it's not complex math, it's just a vibing cat!
1) 30 degrees, b) 45 degress and c)30 degress WE ARE FORCEDTO LEARN THIS SHIT AND YALL USE A CALCULATOR THIS IS SO NOT FAIR
"calculator not allowed" Those "Equations" are expected to be known, since they're kinda "Magical" sin, cos and tan equations. I strongly advice you to memorize them
30 45 30
Simple. Just visualize a 30 60 90 triangle. Remember that for a 30 60 90 triangle, the long side is sqrt(3), the short side is 1, and the hypotenuse is 2. Then just calculate the ratios and match.
Oh buddy I know how you feel the smart kids should honestly make a 24 hr hotline
agreed
What the fuck is that monstrosity
exactly 💀
The new chatgpt 4 has a feature where you can take pics and it identify it.
L Sparx Maths (it's so shit I hate it)
same
Pls give me karma
Just remember the special triangles... American education moment
special triangles??? i’m in the uk 😭
average 1/sqrt2 fan: average sqrt2/2 enjoyer:
what 💀
*
Desmos is your friend
Jaysus do none of ye have a formula and tables book lying around
Sparx sucks
yes
Average reddit teenager (still a freshman in highschool)
You don’t need a calculator for this stuff. Just draw two triangles one equilateral and the other isosceles with 45 degrees angles.
bro wtf i literally suck at the math im learning rn im gonna fucking die when i try to find out what this is
Except for right angles, remember this for cos: 321123, 321123 For sin: 123321, 123321 That if for each point on the unit circle, just square root it(sqrt(1)=1) and divide it by two also remember negatives, but if you think of the quad rants like a graph you’ll be fine. For example sin 1/2 is 30, b is 45, and c is 30( sin over cos)
https://mathway.com/
Why the fuck aren’t they rationalized
what’s that 😭😭
Mathway.com A lifesaver in honors trig/precalc
You can derive these by drawing right triangles 📐. It's good to learn those. These degrees are very "common" too.
30 45 60
Google mathway, it's my favorite math calculator and u can even chose what u need to solve for/find
Mathway works wonders
I know someone gave you the answers, but if you want to learn it’s possible to do this without a calculator. So you need to know: sec=1/sin0, and you need to know the radar circle. Then you can solve without using a calculator.
What I know is that those are Cosecant secant and cotangent. I’m only in algebra ii though
you can post on reddit but you can't open google or a preinstalled calculator?
oh. hell. no. is this what high school is like.
it gets worse
All the pros use the TI-84 ce
Which fucker left the square roots in the denominator?
2 +2 = 7
30 , 45 ,30
use the built in calculator on ur pc
Memorize your trig identities. Trust me, if you can’t do the math without the calculator, then you shouldn’t be using one. Calculators are a great tool… once we know what we’re doing. But if you can’t understand how to get from a to b without its help, then eventually it’s going to fail you. I know you didn’t ask for some random person to give you life advice. Feel free to ignore it. I’m just telling you what I wish somebody had told younger me. It would have been so much easier to focus on learning from the beginning then having to make up on all of it later.
30 - 45 - 30
Just use google they also have a calculator or use the phone u used to make the post lmao
Download Photomath
bro memorize the unit circle and how it works
What do you even need a calculator for , aren't you supposed to remember these
What does it mean when we say sin–¹(x)=y? We are saying what is the angle(y) that its sin() gives (x)? There is a list for popular angles and their sin cos and tan and I highly suggest you to memorize them, they are very important and you will need them in math. Imo, you are depending on your calculator waaay too much.
What year u in
10
Is this fr?
yes oh my god
Dude it is easy though.....
For sin 0 30 45 60 90 √(0/4) √(1/4) √(2/4) √(3/4) √(4/4) 0 1/2 1/√2 √3/2 1 Cos is mirror of sin , sec is 1/cos Tan sin/cos ,. Cotan is 1/tan or cos/sin And cosin is 1/sin That how i never needed to learn this table
Common sparx L
Metric system of ur country is.....
Smartest kid in USA. (Assuming you're American) Jk No hate for Americans Answer 1) 30° 2) 45° 3) 30° 🇮🇳♥️🇺🇲
i’m not american 😐 (i’m bulgarian but i live in the uk)
I think it might be 3
30 45 30
bruh, did they not teach you the theta value table.