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OpenStudy (anonymous):
Derivative of cosxsin3x
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OpenStudy (kainui):
Take a guess and I'll help you figure it out. =D
OpenStudy (amonoconnor):
Do you know how to use the Product Rule?
OpenStudy (amonoconnor):
dy/dx = (u)v' + (u')v
OpenStudy (anonymous):
(cosx)(3cos3x)+(-sinx)(sin3x)
OpenStudy (amonoconnor):
Are you sure about the derivative of sin3x there?
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OpenStudy (anonymous):
nope
OpenStudy (agent0smith):
Looks good to me.
OpenStudy (amonoconnor):
Are you thinking of/ using the "inside outside" rule?
OpenStudy (agent0smith):
His derivative is correct... http://www3.wolframalpha.com/Calculate/MSP/MSP312720a555g7a88hbcb300003114d994fiaahd82?MSPStoreType=image/png&s=30&w=498&h=670
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