$\tan ^{-1} \frac{1}{3}+\tan ^{-1} \frac{1}{5}+\tan ^{-1} \frac{1}{7}+\tan ^{-1} \frac{1}{8}$ का मान $ . . . . . . $ है।

  • A
    $\frac{11 \pi}{5}$
  • B
    $\frac{\pi}{4}$
  • C
    $\pi$
  • D
    $\frac{3 \pi}{4}$

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Similar Questions

यदि $\frac{1}{2} \leq x \leq 1$ है, तो $\cos ^{-1} x+\cos ^{-1}\left(\frac{x}{2}+\frac{1}{2} \sqrt{3-3 x^2}\right)$ का मान ज्ञात कीजिए।

यदि $\sum_{n=1}^k \tan ^{-1}\left(\frac{1}{n^2+3 n+3}\right)=\tan ^{-1} \alpha$ है, तो $\alpha=$

$2 \tan ^{-1} \frac{1}{5}+\sec ^{-1} \frac{5 \sqrt{2}}{7}+2 \tan ^{-1} \frac{1}{8}=$

$\cot \left[\sum_{n=3}^{32} \cot ^{-1}\left(1+\sum_{k=1}^n 2 k\right)\right]=$

यदि $\cos ^{-1}\left(\frac{5}{13}\right)+\cos ^{-1}\left(\frac{3}{5}\right)=\cos ^{-1} x$ है, तो $x$ का मान ज्ञात कीजिए।

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