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OpenStudy (anonymous):
sin4x=2sin2xcos2x
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OpenStudy (anonymous):
sin(2x) = 2sin(x)cos(x). If we replace x with 2x, we get: sin[2(2x)] = sin(4x) = 2sin(2x)cos(2x). Therefore, 2sin(2x)cos(2x) = sin(4x) as required.
OpenStudy (anonymous):
dang smarty
OpenStudy (anonymous):
\[welcome \to os\]
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