Simplify Trig Expression: Quotient with Sines and Cosines and Double Angle

This video explains how to simplify or change for form of a trigonometric expression to select and equivalent expression or determine a trigonometric identity.

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Simplify Trig Expression (cos x)^4-(sin x)^4

This video explains how to simplify or change for form of a trigonometric expression to select and equivalent expression or determine a trigonometric identity.