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 what is the derivative of cos3x????????????????
Asked by Shivani Thakur(student) , on 14/3/11

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d/dx (cos 3x) =  d/dx (cos 3x) .d/dx (3x)  (by using chain rule )

  =  (- sin 3x) (3)

  = -3 sin 3x

Posted by Sr(student)on 14/3/11

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d(cos3x)/dx= -sin3x.3


Posted by $@nch!t@ <3 <3(student)on 19/3/11

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