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Mathematics, 30.03.2021 18:20 maddynichole2017
1. Derive this identity from the sum and difference formulas for cosine:
sin a sin b = (1 / 2)[cos(a β b) β cos(a + b)]
Calculation Reason
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1. Derive this identity from the sum and difference formulas for cosine:
sin a sin b = (1 / 2)[cos(...
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