OpenStax, Algebra and Trigonometry 2e §9.4 Sum-to-Product and Product-to-Sum Formulas · Try It 4 · Trigonometry · Compound & multiple angles

Sum-to-Product and Product-to-Sum Formulas · Try It 4

Use the sum-to-product formula to write the sum as a product: $s in (3 θ) + s in (θ) .$

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OpenStax, Algebra and Trigonometry 2e · §9.4 Sum-to-Product and Product-to-Sum Formulas · Try It 4

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