Q. 24.7( 3 Votes )

Differentiate each of the following w.r.t. x:

cos 5x

Answer :

Formulae :




Let,


y = cos 5x


and u = 5x


therefore, y= cos u


Differentiating above equation w.r.t. x,


………… By chain rule



………….


= - sin 5x . 5


= - 5 sin 5x


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