Question

find the exact value?!
sin [arc cos(15/17)]

Answer 1

Use a triangle to understand this:

Let \[\huge \theta=\cos^{-1}\frac{15}{17}\]

Answer 2

Find the question mark and then you can find what sintheta is using your trig knowledge.

Answer 3

well the missing side is 8 where do i go from there??

Answer 4

Then, you know that sintheta=opposite/hypotenuse

Answer 5

So what would sintheta=? When you know that the opposite side is 8.