Find the derivative of the following functions:
(a) g ( θ ) = π 2 ( sec θ − sin 2 θ ) 2 {\displaystyle g(\theta )={\frac {\pi ^{2}}{(\sec \theta -\sin 2\theta )^{2}}}}
(b) y = cos ( 3 π ) + tan − 1 ( x ) {\displaystyle y=\cos(3\pi )+\tan ^{-1}({\sqrt {x}})}
Solution
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