1.Using exact values, verify that

Question

cos 60°=1-2 sin² 30°

Answer 1

I am not certain what I am seeing.
Is it

cos^2 60=1-2sin^2 30 ?
3/4=?=1-2*1/4
so it doesn't verify...so I must not be seeing the type clearly

Answer 2

This is exacly how the question goes, This is a test question.

1.Using exact values, verify that
cos 60°=1-2 sin² 30°