Q3 of 354 Page 12

Differentiate the following functions with respect to x :

(1 + cos x)x

Let y = (1 + cos x)x


Taking log both the sides:


⇒ log y = log (1 + cos x)x


⇒ log y = x log (1+ cos x) {log xa = alog x}


Differentiating with respect to x:












Put the value of y = (1 + cos x)x :



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