2026 HSC CHAT (13 Viewers)

[cheesynooby]

Could someone explain why the second step was taken?

the question asks for all the solutions for -π ≤ theta ≤ π
which is -2π ≤ 2theta ≤ 2π
so u want all the solutions in that range

 

[Bendwhat?_over]

the question asks for all the solutions for -π ≤ theta ≤ π
which is -2π ≤ 2theta ≤ 2π
so u want all the solutions in that range

I apologise. I meant the highlighted section.

 

[Study to success]

Attention everyone !!!! Is anyone doing the Independent or PEM prelim papers and are doing it before next week. Cause then I could possibly cheat hehe

 

[WishingForPastPapers]

I currently am trying to finish my geo presentation. Anyone have any funny geo or eco memes Thank you (The presentation is about palm oil lol)

 

[Study to success]

I currently am trying to finish my geo presentation. Anyone have any funny geo or eco memes Thank you (The presentation is about palm oil lol)

omg I did a whole assignment for geo elective last year on palm oil. I got full marks hehe

 

[Study to success]

Guys what book should I pick to read tmrw for eng. We're getting a reading lesson. The first one since like year 9 hehe

 

[WishingForPastPapers]

omg I did a whole assignment for geo elective last year on palm oil. I got full marks hehe

ahem )

 

[WishingForPastPapers]

Guys what book should I pick to read tmrw for eng. We're getting a reading lesson. The first one since like year 9 hehe

Dear mrs dunkley, would highly recommend with the caveat of why not

 

[Study to success]

Dear mrs dunkley, would highly recommend with the caveat of why not

yeah I'm not reading a mod c hsc text (well at least that's what it came up with when I searched it up)

 

[alphxreturns]

I apologise. I meant the highlighted section.

ASTC (sin2ø is negative so T and C, therefore π+ø and 2π-ø) (3rd and 4th quads)

 

[Bendwhat?_over]

Guys what book should I pick to read tmrw for eng. We're getting a reading lesson. The first one since like year 9 hehe

You should read everything I've written ever

 

[cheesynooby]

I apologise. I meant the highlighted section.

oh whoops sorry i thought u meant why they did all those different solutions, not how they got there
sinx is periodic (with a period of 2π) so if ur working out the solutions to sinx = something there will be infinite solutions.
adding/subtracting an integer multiple of 2π to any solutions u get for the range from 0 to 2π will thus also work (since the sine curve repeats every 2π)
from considering the unit circle, u can get that there is a solution in the 3rd quadrant and 4th quadrant which gives u the solutions for 0 ≤ 2theta ≤ 2π
(u could think of this as the angle such that the point on the unit circle as a y coordinate of -sqrt3/2 which is in the 3rd and 4th quadrant)
to get for -2π ≤ 2theta ≤ 2π therefore u subtract 2π from each of those 2 solutions.

 

[Study to success]

You should read everything I've written ever

but I don't think my teacher will let us use devices tho

 

[Study to success]

I'm gonna punctuate the equilibrium of my prelim study. (bio people will get it)

 

[WishingForPastPapers]

You should read everything I've written ever

I will hehe

 

[isho-3]

i'm debating whether i actually want to put effort for my chinese oral exam this coming friday or if i'm just gonna pretend it doesnt exist until the day before and keep working on my ee1 ip,,,,,,,

 

[l_zwa]

Most of it was from the middle to end of last year, quite a few members that have now mostly left were VERY active here...

rip why did shavi leave

 

[l_zwa]

we should make an insta gc

 

[Study to success]

Who else is cooked and has done 0 study (me). Whenever I try to study my body shuts down so I guess the universe just wants me to give up. I swear I need to get out of my house and do other stuff but my parents won't let me and it pmo. And then they blame me for not doing any exercise. Do u guys think if I talk to the school counsellor then they can explain to my year co/ teachers as to why I did so terrible on prelims

 

[WishingForPastPapers]

Who else is cooked and has done 0 study (me). Whenever I try to study my body shuts down so I guess the universe just wants me to give up. I swear I need to get out of my house and do other stuff but my parents won't let me and it pmo. And then they blame me for not doing any exercise. Do u guys think if I talk to the school counsellor then they can explain to my year co/ teachers as to why I did so terrible on prelims

Talk to the school counsellor on about your mental wellbeing, you need off days and take walks without your phone to destress.