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

  • A
    $\frac{10}{3}$
  • B
    $\frac{8}{3}$
  • C
    $\frac{14}{3}$
  • D
    $\frac{16}{3}$

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સાબિત કરો કે $2 \sin ^{-1} \frac{3}{5} = \tan ^{-1} \frac{24}{7}$.

જો $S = \{x \in R : \sin^{-1}\left(\frac{x+1}{\sqrt{x^2+2x+2}}\right) - \sin^{-1}\left(\frac{x}{\sqrt{x^2+1}}\right) = \frac{\pi}{4}\}$,હોય તો $\sum_{x \in S} \left(\sin\left((x^2+x+5)\frac{\pi}{2}\right) - \cos((x^2+x+5)\pi)\right)$ ની કિંમત $........$ થાય.

જો $\tan^{-1} x + \tan^{-1} y = \frac{\pi}{4}$ હોય,તો:

વિધેયને તેના સૌથી સરળ સ્વરૂપમાં લખો: $\tan ^{-1} \left( \frac{\sqrt{1+x^{2}}-1}{x} \right), x \neq 0$

સમીકરણ $\tan ^{-1} x+\tan ^{-1} 2 x=\frac{\pi}{4}$ નું સમાધાન કરતી $x$ ની વાસ્તવિક કિંમત છે

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