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Question Number 66140 by AnjanDey last updated on 09/Aug/19

1 . S h o w t h a t : \int_{0}^{\frac{π}{2}} f (\sin 2 x) \sin x d x = \sqrt{2} \int_{0}^{\frac{π}{4}} f (\cos 2 x) \cos x d x .

2 . I f f (z) = \frac{d}{d z} {5^{∣ f (z) ∣}} t h e n w h a t i s t h e v a l u e o f f^{'} (e) ?