OpenStax, Algebra and Trigonometry 2e §9.3 Double-Angle, Half-Angle, and Reduction Formulas · Example 5 · Trigonometry · Compound & multiple angles

Writing an Equivalent Expression Not Containing Powers Greater Than 1

Write an equivalent expression for $co s^{4} x$ that does not involve any powers of sine or cosine greater than 1.

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OpenStax, Algebra and Trigonometry 2e · §9.3 Double-Angle, Half-Angle, and Reduction Formulas · Example 5

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