$2{\tan ^{ - 1}}\left( {\frac{1}{3}} \right) + {\tan ^{ - 1}}\left( {\frac{1}{7}} \right) = $

  • A
    ${\tan ^{ - 1}}\left( {\frac{{49}}{{29}}} \right)$
  • B
    $\frac{\pi }{2}$
  • C
    $0$
  • D
    $\frac{\pi }{4}$

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સમીકરણ $\sin^{-1} x = 2 \tan^{-1} x$ (મુખ્ય કિંમતોમાં) ના ઉકેલોની સંખ્યા શોધો.

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જો $\frac{1}{2} \sin^{-1}\left(\frac{3 \sin 2\theta}{5+4 \cos 2\theta}\right) = \tan^{-1} x$ હોય,તો $x =$

જો $x \in \left(0, \frac{1}{4}\right)$ માટે,$\tan^{-1}\left(\frac{6x\sqrt{x}}{1-9x^3}\right)$ નું વિકલન $\sqrt{x} \cdot g(x)$ હોય,તો $g(x)$ ની કિંમત શોધો.

જો $2 \sin^{-1} x - 3 \cos^{-1} x = 4$ હોય, તો $2 \sin^{-1} x + 3 \cos^{-1} x =$ ની કિંમત શોધો.

જો $\cos ^{-1} 2x + \cos ^{-1} 3x = \frac{\pi}{3}$ હોય, તો $x =$

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