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Sum to Product Formulas for Sine and Cosine
Relation of the sum or difference of two trigonometric functions to a product.
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Sum-to-Product Formulas - Example 1
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Use the sum-to-product formula to write the sum or difference as a product
MAT.TRG.307.5 (Sum to Product Formulas for Sine and Cosine - Trigonometry)
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