यदि $\tan^{-1} (ax) + \tan^{-1} (3x) = \frac{\pi}{4}$, जहाँ $3ax^2 < 1$, तो $x = \frac{1}{6}$ के लिए $a$ का मान क्या है...

  • A
    $2$
  • B
    $3$
  • C
    $4$
  • D
    $9$

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यदि ${x^2} + {y^2} + {z^2} = {r^2}$ है,तो ${\tan ^{ - 1}}\left( {\frac{{xy}}{{zr}}} \right) + {\tan ^{ - 1}}\left( {\frac{{yz}}{{xr}}} \right) + {\tan ^{ - 1}}\left( {\frac{{zx}}{{yr}}} \right) = $

यदि $2 \sin^{-1} x - 3 \cos^{-1} x = 4$ है, तो $2 \sin^{-1} x + 3 \cos^{-1} x =$ का मान क्या होगा?

यदि $\sin^{-1} x + \sin^{-1} y = \frac{2\pi}{3}$ है,तो $\cos^{-1} x + \cos^{-1} y = $

यदि $y=\tan ^{-1}\left(\frac{3 x-x^3}{1-3 x^2}\right)+\tan ^{-1}\left(\frac{4 x-4 x^3}{1-6 x^2+x^4}\right)$ है, तो $\frac{d y}{d x}$ का मान क्या होगा?

मान ज्ञात कीजिए: ${\tan ^{ - 1}}\left[ {\frac{{\cos x}}{{1 + \sin x}}} \right]$

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