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Asked Oct 30, 2019
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3. sin(x +y) + sin(x - y) = 2 sin x cos y
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3. sin(x +y) + sin(x - y) = 2 sin x cos y

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The given ide...

sin(x+y)+sinx-y)=2 sinx cos y
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sin(x+y)+sinx-y)=2 sinx cos y

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Math

Trigonometry