# Trigonometry

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

• Trigonometry -

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

• Trigonometry -

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

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

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