यदि $y = \cos^{-1}\left( \frac{3\cos x + 4\sin x}{5} \right)$ है,तो $\frac{dy}{dx} = $

  • A
    $0$
  • B
    $1$
  • C
    $-1$
  • D
    $\frac{1}{2}$

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यदि $\operatorname{Tan}^{-1}\left[\frac{1}{1+1(2)}\right]+\operatorname{Tan}^{-1}\left[\frac{1}{1+(2)(3)}\right]+\operatorname{Tan}^{-1}\left[\frac{1}{1+(3)(4)}\right]+\cdots+\operatorname{Tan}^{-1}\left[\frac{1}{1+n(n+1)}\right]=\operatorname{Tan}^{-1} \theta$ है,तो $\theta=$

$\sin(\cot^{-1}(\tan(\cos^{-1}x)))$ का मान किसके बराबर है?

समीकरण $2\cos^{-1}x + \sin^{-1}x = \frac{11\pi}{6}$ के

$2 \tan ^{-1}\left(\frac{1}{3}\right)-\tan ^{-1}\left(\frac{3}{4}\right)=$

$\cos \left[\cos ^{-1}\left(-\frac{1}{7}\right)+\sin ^{-1}\left(-\frac{1}{7}\right)\right]$ का मान ज्ञात कीजिए।

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