मान ज्ञात कीजिए: $\sin ^{-1}\left(\frac{3}{5}\right) + \tan ^{-1}\left(\frac{1}{7}\right) = $

  • A
    $\frac{\pi }{4}$
  • B
    $\frac{\pi }{2}$
  • C
    $\cos ^{-1}\left(\frac{4}{5}\right)$
  • D
    $\pi $

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$\frac{1}{2}{\cos ^{ - 1}}\left( {\frac{{1 - x}}{{1 + x}}} \right) = $

सिद्ध कीजिए कि $\tan ^{-1} \frac{63}{16}=\sin ^{-1} \frac{5}{13}+\cos ^{-1} \frac{3}{5}$

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यदि $\sin ^{-1} x+\sin ^{-1} y=\frac{\pi}{3}$ और $\cot ^{-1}\left(\frac{1}{x}\right)-\cot ^{-1}\left(\frac{1}{y}\right)=0$ है,तो $2 x^2+y^2-x y=$

यदि $\pi \leq x \leq 2 \pi$ है,तो $\cos^{-1}(\cos x)$ किसके बराबर है :-

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