Question

Differentiate w.r.t.x:

Answer 1

Solution:-

given by:-
$y = log \cos(x) \\ diff \: with \: r \: to \: x \\ \frac{dy}{dx} = \frac{d}{dx} ( log \cos(x) ) \\ = \frac{1}{ \cos(x) } . - \sin(x) \\ = \frac{ - \sin(x) }{ \cos(x) } \\ = - \tan(x)$
☆i hope its help☆