MediumIdentities

OpenStax, Algebra and Trigonometry 2e §9.1 Verifying Trigonometric Identities and Using Trigonometric Identities to Simplify Trigonometric Expressions · Exercise 29 · Trigonometry · Identities

Verifying Trigonometric Identities and Using Trigonometric Identities to Simplify Trigonometric Expressions · Exercise 29

Verify the identity.

$cos x - co s^{3} x = cos x s i n^{2} x$

This is an open-ended exercise: its source gives no single answer.

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OpenStax, Algebra and Trigonometry 2e · §9.1 Verifying Trigonometric Identities and Using Trigonometric Identities to Simplify Trigonometric Expressions · Exercise 29

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