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 what is the derivative of cos3x????????????????

Asked by Shivani Thakur(student), on 14/3/11

Answers

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

  =  (- sin 3x) (3)

  = -3 sin 3x

Posted by Shahbaz Ahmed(student), on 14/3/11

d(cos3x)/dx= -sin3x.3

thus,d(cos3x)/dx=-3sin3x

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