Question

Can you write this as an algebraic expression?
cos(arcsin3x)

Answer 1

let imagine : arcsin3x = a;
then our problem changes to this one : cos(a)
arc sin3x = a => sina=3x =>cos a = \[\sqrt{1-({3x})^{2}}\]

Answer 2

clear?

Answer 3

Yes, so how would that relate to a triangle?

Answer 4

I don't get what you mean =(

Answer 5

Hm, My problem says "Hint: draw a triangle"

Answer 6

I'm awfully sorry but I don't know!

Answer 7

Well thanks for your help!