$\cot \left( \sum\limits_{r = 1}^\infty \tan^{-1} \left( \frac{4}{4r^2 + 3} \right) \right)$ નું મૂલ્ય કેટલું થાય?

  • A
    $1$
  • B
    $\frac{1}{2}$
  • C
    $2$
  • D
    $\frac{1}{4}$

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Similar Questions

$\tan \left[ 2\tan^{-1}\left( \frac{1}{5} \right) - \frac{\pi}{4} \right] = $

જો $f(x) = \tan^{-1}\left\{ \frac{\log(e/x^2)}{\log(ex^2)} \right\} + \tan^{-1}\left( \frac{3 + 2\log x}{1 - 6\log x} \right)$ હોય,તો $\frac{d^n y}{dx^n}$ શું થાય? $(n \ge 1)$

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

શ્રેણી $\tan^{-1}\left(\frac{1}{3}\right) + \tan^{-1}\left(\frac{2}{9}\right) + \dots + \tan^{-1}\left(\frac{2^{n-1}}{1+2^{2n-1}}\right) + \dots$ ના અનંત પદોનો સરવાળો શોધો.

જો $\sin \left( \sin^{-1} \frac{1}{5} + \cos^{-1} x \right) = 1$ હોય,તો $x$ ની કિંમત શોધો.

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