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OpenStudy (anonymous):
True or False, cos(x/5)sin(x/5)=1/2 sin(2x/5) I think it is True.
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OpenStudy (aum):
sin(2A) = 2sin(A)cos(A) sin(A)cos(A) = 1/2 * sin(2A). Therefore, cos(x/5)sin(x/5)=1/2 sin(2x/5)
OpenStudy (anonymous):
So it is true?
OpenStudy (aum):
Yes.
OpenStudy (anonymous):
great can you help with another one?
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