Hi everyone,

Question

I've been stuck on this question. Please anyone help. Show step by step and answers. Thank you.

- Determine the​ quarter point of
y=−cos(2x−π)

THANK YOU.

Answer 1

when x = 0, cos -pi = -1
when x = pi/4, cos -pi/2 = 0
when x = pi/2 , cos 0 = 1
when x = 3 pi/4, cos pi/2 = 0
etc