Answers PrecalculusTrigonometric Difference Identities

Trigonometric Difference Identities Answers

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Step 1:

Cofunction identity

Definition of sine

Distributive property

Cosine difference identity

Step 5:

Cosine function is an even function

Cosine difference identity

Sine function is an odd function

Cofunction Identity

Step 6:

Cosine function is an even function

Trigonometric difference identity

Sine function is an odd function

Cofunction Identity

Step 7:

Cosine function is even, sine function is odd.

Trigonometric difference identity

Cofunction identity

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