OpenStax, Algebra and Trigonometry 2e §9.4 Sum-to-Product and Product-to-Sum Formulas · Exercise 52 · Trigonometry · Compound & multiple angles
Sum-to-Product and Product-to-Sum Formulas · Exercise 52
Simplify the expression to one term, then graph the original function and your simplified version to verify they are identical.
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OpenStax, Algebra and Trigonometry 2e · §9.4 Sum-to-Product and Product-to-Sum Formulas · Exercise 52
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