solve power reducing formulas

4cos^2-3=0
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1 Answer

4cos^2x - 3 = 0

4cos^2x = 3

cos^2x = 3/4

cosx = sqrt (3/4)

cosx = sqrt3/2 ⇒ x = 60 degree, because cos 60 = sqrt3/2

by Level 8 User (36.8k points)

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