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OpenStudy (anonymous):
what is the derivative of cosxsin3x?
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OpenStudy (anonymous):
\[(-sinx)(\sin3x)+cosx(\cos3x)(3)\] \[-\sin^23x+3\cos^23x\]
OpenStudy (zarkon):
@winterfez you can't combing the sines and cosines like that
OpenStudy (zarkon):
*combine
OpenStudy (anonymous):
is cosx time sin3x, thus I can use addition for derivative
OpenStudy (zarkon):
\[(-\sin(x))\sin(3x)\ne -\sin^2(3x)\]
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OpenStudy (anonymous):
oh that was what you were pointing out..THANKS..didnt see that mistake
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