OpenStax, Precalculus 2e §7.1 Simplifying and Verifying Trigonometric Identities · Example 9 · Trigonometry · Identities

Rewriting a Trigonometric Expression Using the Difference of Squares

Rewrite the trigonometric expression: $4 co s^{2} θ - 1.$

~5 minWritten answer · compare with the solution

OpenStax, Precalculus 2e · §7.1 Simplifying and Verifying Trigonometric Identities · Example 9

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