MCQ
$\frac{d}{d x}\left(\tan \frac{x}{3}\right)=$
  • A
    $\sec ^2 (\frac{x}{3})$
  • $\frac{1}{3} \sec ^2 \frac{x}{3}$
  • C
    $3 \sec ^2 \frac{x}{3}$
  • D
    $3 \cot \frac{x}{3}$

Answer

Correct option: B.
$\frac{1}{3} \sec ^2 \frac{x}{3}$
B

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