$n \in N$ માટે,જો $\cot ^{-1} 3+\cot ^{-1} 4+\cot ^{-1} 5+\cot ^{-1} n=\frac{\pi}{4}$ હોય,તો $n$ ની કિંમત ......... છે.

  • A
    $70$
  • B
    $56$
  • C
    $10$
  • D
    $47$

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$\tan ^{-1}(\cot x)+\cot ^{-1}(\tan x) =$ . . . . . .

$\cot ^{-1}\left[\frac{\sqrt{1-\sin x}+\sqrt{1+\sin x}}{\sqrt{1-\sin x}-\sqrt{1+\sin x}}\right]$ ની કિંમત શોધો,જ્યાં $x \in\left(0, \frac{\pi}{4}\right)$ છે.

સમીકરણ $\sin^{-1} x = 2 \tan^{-1} x$ (મુખ્ય કિંમતોમાં) ના ઉકેલોની સંખ્યા શોધો.

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$\operatorname{cosec}\left[2 \cot ^{-1}(5)+\cos ^{-1}\left(\frac{4}{5}\right)\right]$ ની કિંમત ..... છે.

સમીકરણ $\sin \left[ \cot^{-1} (1 + x) \right] = \cos \left[ \tan^{-1} x \right]$ નું સમાધાન કરતું $x$ નું મૂલ્ય શોધો.

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