Class of 2025 (2025 HSC CHAT) (3 Viewers)

[Study to success]

also i legit spent like 40+ minutes total yesterday across the idk, like 9-10 hours of maths, ranting about the uselessness of this:
View attachment 48232

like whoever decided that they would format all their equations using this USELESS formula should go fuck themselves... idk if i should actually get into what i mean cuz i rlly gotta get back to intro to calc

Ikr. I can’t believe some people like trig

 

[Socialism]

ohh yeah that could be simplified so easily... just learn ASTC and how to do each angle, that's it. overcomplication at its finest right there

LITERALLY OMFG YES YOU GET IT RIGHT AWAY... just remember astc and the equation for each quadrant
but it really annoys me that they write questions like that too
because it really shouldn't be, say, sin(180-theta) = theta, the formula really should be 180-x = theta or whatever and forget the rubbish... because if you actually look at what you have to do to use that formula to work it out, YOU LITERALLY CAN'T USE THE VALUE THEY GIVE YOU IN THAT FORMULA. SO YOU HAVE TO DO 180-X ANYWAY

honestly, idk how you'd represent sin, cos and tan, but HERE'S a formula that ACTUALLY WORKS and YOU CAN PUT THE NUMBER THEY GIVE YOU INTO IT

1st quad, x=theta
2nd quad, 180-x=theta
3rd quad, x-180=theta
4th quad, 360-x=theta

because when you get a question like, "find the exact value of cos240" you can't put 240 anywhere into that equation. you HAVE TO TAKE 180 OFF THO!! so hence my new and improved equation... 240-180=theta bam you have your answer...

 

[Study to success]

LITERALLY OMFG YES YOU GET IT RIGHT AWAY... just remember astc and the equation for each quadrant
but it really annoys me that they write questions like that too
because it really shouldn't be, say, sin(180-theta) = theta, the formula really should be 180-x = theta or whatever and forget the rubbish... because if you actually look at what you have to do to use that formula to work it out, YOU LITERALLY CAN'T USE THE VALUE THEY GIVE YOU IN THAT FORMULA. SO YOU HAVE TO DO 180-X ANYWAY

honestly, idk how you'd represent sin, cos and tan, but HERE'S a formula that ACTUALLY WORKS and YOU CAN PUT THE NUMBER THEY GIVE YOU INTO IT

1st quad, x=theta
2nd quad, 180-x=theta
3rd quad, x-180=theta
4th quad, 360-x=theta

because when you get a question like, "find the exact value of cos240" you can't put 240 anywhere into that equation. you HAVE TO TAKE 180 OFF THO!! so hence my new and improved equation... 240-180=theta bam you have your answer...

I thought for the 3rd quad it’s 180+theta

 

[Socialism]

180+thera

but no, its not... you get 240, then to find theta, you take 180 off!! SO ITS ACTUALLY X-180 !!! LIKE STEP THROUGH HOW TO DO IT
1. cos240 so quad 3 and negative
2. x-180 = theta
3. 240-180 = 60
4. theta = -60 because 3rd quad cos negative

 

[Socialism]

180+thera

THIS IS LITERALLY THE BANE OF MY EXISTENEC YOU CAN'T ADD THETA WHEN YOU HAVEN'T GOT IT YET?????????? FUCK ME OMFG
YOU LITERALLY HAVE TO CALCULATE THETA

 

[Socialism]

HOW DO YOU CALCULATE THETA? X-180... so their dumbass formula is USELESS (except maybe for memorising quadrants in the beginning, but definitely not for calculating anything )

 

[Study to success]

but no, its not... you get 240, then to find theta, you take 180 off!! SO ITS ACTUALLY X-180 !!! LIKE STEP THROUGH HOW TO DO IT
1. cos240 so quad 3 and negative
2. x-180 = theta
3. 240-180 = 60
4. theta = 60

Wait can’t u do 360-240 because cos is positive in the 4th quad which will give 120. Idk what I’m doing. Oh wait but then you’ll just have to minus it from 180 again

 

[Socialism]

Wait can’t u do 360-240 because cos is positive in the 4th quad which will give 120. Idk what I’m doing. Oh wait but then you’ll just have to minus it from 180 again

um, fourth quad at 270, right?

 

[Study to success]

um, fourth quad at 270, right?

Yeah it’s between 270-360. But it’s about whether the or not cos is positive or negative which determines which quad u use right?

 

[Socialism]

study cos240 is in the third quadrant
and cos is negative in that quadrant...

were u getting messed up cuz i forgot the negative

 

[alphxreturns]

Yeah it’s between 270-360. But it’s about whether the or not cos is positive or negative which determines which quad u use right?

i think its more which quad its in determines whether or not cos is +-

 

[Socialism]

study cos240 is in the third quadrant
and cos is negative in that quadrant...

were u getting messed up cuz i forgot the negative

now i fixed my og post

 

[Study to success]

study cos240 is in the third quadrant
and cos is negative in that quadrant...

were u getting messed up cuz i forgot the negative

Oh. There was a neg. whoops

 

[tropics...]

real i lowkey only absorbed 50% of mod 7 i cannot confidently tell you what an aldehyde is

LITERALLY like whats a ketone tf

 

[Study to success]

why does chem have like the weirdest names for things ever. Like they're so goofy

 

[watermelonenjoyer]

i'm so bored oh my (i'm not gonna be saying this when i actually have to write my chapter)

 

[watermelonenjoyer]

ok so i didn't do my chapter since i was at vocal, and training went for longer than expected, but i did finish my content analysis... a win's a win?

 

[adammmaa]

Yo, where did that massive thread TyWebb made with all of last year's trials on it from the selective schools? It had like every paper on it

 

[Socialism]

Sorry, wish I could help. I'm too tired, I'm going to bed rn

 

[killer queen]

also i legit spent like 40+ minutes total yesterday across the idk, like 9-10 hours of maths, ranting about the uselessness of this:
View attachment 48232

like whoever decided that they would format all their equations using this USELESS formula should go fuck themselves... idk if i should actually get into what i mean cuz i rlly gotta get back to intro to calc

I'm ngl I never memorised this I just imagine the graphs and pray