Mht CetDifferentiationMHT CET 2026 17th April Evening ShiftMCQ+2 / -02026If $f(x) = \cos x\,\cos 2x\,\cos 4x\,\cos 8x\,\cos 16x$, then $f'\left(\dfrac{\pi}{4}\right) =$A$\text{cosec}\left(\dfrac{\pi}{4}\right)$B$\cos\left(\dfrac{\pi}{4}\right)$C$\tan\left(\dfrac{\pi}{4}\right)$D$0$Check AnswerClear SelectionReveal AnswerShow Explanation
