Mathematics, 15.12.2020 23:40 angie07253
add the sum and difference identities for sin x to derive 1/2 [sin(x + y) + sin(x - y)] = sin x cos y
Answers: 1
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add the sum and difference identities for sin x to derive 1/2 [sin(x + y) + sin(x - y)] = sin x cos...
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