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Can someone help with q14 pls

is it because if a was equal to pi/2, it would have perpendicular sides but from the diagram, it clearly doesnt?

So the question of x doesn’t matter?

HeY CM_Tutor. Just a question for Simple HArmonic Motion, how do u know what formula to use? Like for eg with this question: how would you know to use x = c - acosnt and not x = c + asinnt or x = c - a sinnt or x = c + acosnt or x = c + acos(nt + alpha) why is it x = c - acosnt?

Cm_Tutor , could u help with Q21 (ii), please. I got the answer but was wondering what your method would be:

wait I'm confused as to why alpha cant equal pi/2

Do you know which trial exams from what schools? also would u happen to have any resources for mx2 trials?

can I see your working out please

Hey can anyone solve Q17? been trying to get it fora while but just can’t get anywhere:

Yeah could you send me that as well roaldpotter@gmail.com

Hey to anyone who did an investigation assessment for extension 2, what topics was it assessed on and if you still have a copy of it, could you please send to me? roaldpotter@gmail.com

that's fine i just need one before the 1st of december

My year 11 grades were: term 1: 25/30 (ranked 70th out of 245) Prelim exams: 48/60 ( ranked 24th out of 245) Multimodal assessment: 15/20 (ranked 155th out of 245) basically, I’ve gotten worse as the year hasgone by

Hello, I also need an economics peer marker like someone who can give feedback for free

Hello, I am in need of an English peer reviewer. Basically, someone who can look over my assessments and give feedback for free.

I did that but it’s 576 apparently

I also need help with this q? The answer says 576 but I got 864. Can someone please explain where I went wrong?

Can someone help me with this question? cos3x + cos5x + cos7x = 0, in the domain [0,pi] Surely, there’s a simpler way; rather than expanding the whole left hand side.

and by last paragraph, do you mean by the conclusion?