OpenStax, Algebra and Trigonometry 2e §9.4 Sum-to-Product and Product-to-Sum Formulas · Exercise 22 · Trigonometry · Compound & multiple angles

Sum-to-Product and Product-to-Sum Formulas · Exercise 22

Evaluate the product using a sum or difference of two functions. Leave in terms of sine and cosine.

$cos (23°) s in (17°)$

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OpenStax, Algebra and Trigonometry 2e · §9.4 Sum-to-Product and Product-to-Sum Formulas · Exercise 22

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