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## Homework Statement

I have a graph with the functions f(x)=sin2x and g(x)=cosx. The 2 graphs intersect at point B. They want me to find the co-ordinates of B.

## Homework Equations

## The Attempt at a Solution

Must I equate the two graphs?

sin2x = cosx

2x = 90-x, 3x = 90, x=30 or 2x = 180-(90-x), x=90

It doesnt seem right, is their any other steps?