Answer :


Given :


To prove :


Formula used : =


=



= - sinx


If u and v are functions of x,then = u + v


The CHAIN RULE states that the derivative of f(g(x)) is f’(g(x)).g’(x)


Given that y =


taking log on both sides


log y = log


log y = y log ()


Differentiating both sides with respect to x


=


= log() + y


= log() + y


= log() + y


log) = - y




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