$\frac{d}{dx} \left( \tan^{-1} \left( \frac{\cos x}{1 + \sin x} \right) \right) =$

  • A
    $1/2$
  • B
    $-1/2$
  • C
    $1$
  • D
    $-1$

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Difficult
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જો $\tan ^{-1}(2 x)+\tan ^{-1}(3 x)=\frac{\pi}{4}$,જ્યાં $x>0$,તો $x=$

જો $\sin ^{-1} \frac{x}{5}+\sin ^{-1} \frac{4}{5}=\frac{\pi}{2}$ હોય,તો $x=$ . . . . . . .

$\tan \left(\frac{1}{4} \sin ^{-1} \frac{\sqrt{63}}{8}\right)$ ની શક્ય કિંમત કઈ છે?

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