nerdfunction nerdfunction

21-01-2017
Mathematics

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Which expression is equivalent to sin(2x) − sin x?

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foggles foggles

22-01-2017

sin(2x) -sin(x) = 2sin(x)cos(x) - sin(x)
Since sin(2x) = 2sin(x)cos(x)
∴ sin(2x) - sin(x) = sin(x)(2cos(x) - 1)

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