$\cot^{-1}(1) + \cot^{-1} (\frac{1}{2}) + \cot^{-1}(\frac{1}{3}) =$

  • A
    $0$
  • B
    $\frac{3 \pi}{4}$
  • C
    $\frac{2 \pi}{3}$
  • D
    $\pi$

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Similar Questions

સરવાળો $\sum\limits_{n = 1}^\infty {{\cot }^{ - 1}} \left( {\frac{{2\left( {\sum\limits_{k = 1}^n k } \right) - 1}}{3}} \right)$ ની કિંમત શોધો.

જો $\alpha, \beta, \gamma \neq 0$ હોય અને $\sin ^{-1} \alpha+\sin ^{-1} \beta+\sin ^{-1} \gamma=\pi$ તથા $(\alpha+\beta+\gamma)(\alpha-\gamma+\beta)=3 \alpha \beta$ હોય,તો $\gamma$ ની કિંમત શોધો.

ધારો કે $f(x) = \cos \left(2 \tan ^{-1} \sin \left(\cot ^{-1} \sqrt{\frac{1-x}{x}}\right)\right)$,$0 < x < 1$ માટે. તો :

$x \in[-1,1]$ માટે સમીકરણ $\sin ^{-1}\left[x^{2}+\frac{1}{3}\right]+\cos ^{-1}\left[x^{2}-\frac{2}{3}\right]=x^{2}$ ના ઉકેલોની સંખ્યા શોધો,જ્યાં $[x]$ એ મહત્તમ પૂર્ણાંક વિધેય છે.

$\cot ^{-1}\left(2 \cdot 1^{2}\right)+\cot ^{-1}\left(2 \cdot 2^{2}\right)+\cot ^{-1}\left(2 \cdot 3^{2}\right)+\ldots$ અનંત સુધીનું મૂલ્ય શોધો.

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