MCQ
$\frac{d}{d x}\left[\log \left(\cos e^x\right)\right]=?$
  • A
    $e^x+\tan x$
  • $-e^x \tan \left(e^x\right)$
  • C
    $e^x \cot x$
  • D
    $e^x \cos x$

Answer

Correct option: B.
$-e^x \tan \left(e^x\right)$
B

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