$\tan^{-1} \left[ \frac{\sqrt{1+x^2} + \sqrt{1-x^2}}{\sqrt{1+x^2} - \sqrt{1-x^2}} \right] = $

  • A
    $\frac{\pi}{4} + \frac{1}{2} \cos^{-1} x^2$
  • B
    $\frac{\pi}{4} + \cos^{-1} x^2$
  • C
    $\frac{\pi}{4} + \frac{1}{2} \cos^{-1} x$
  • D
    $\frac{\pi}{4} - \frac{1}{2} \cos^{-1} x^2$

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$\tan ^{-1}\left(\frac{x}{y}\right)-\tan ^{-1} \left(\frac{x-y}{x+y}\right)$ ની કિંમત શોધો.

$2 \tan ^{-1} \frac{1}{2} + \tan ^{-1} \frac{3}{8}$ નું મૂલ્ય શું છે?

$2 \tan^{-1} \frac{1}{2} + \tan^{-1} \frac{1}{7}$ ની કિંમત શોધો.

જો $a > b > 0$ અને $\sec^{-1} \left( \frac{a+b}{a-b} \right) = 2 \sin^{-1} x$ હોય,તો $x$ ની કિંમત શોધો.

સાબિત કરો કે $\sin ^{-1}(2 x \sqrt{1-x^{2}})=2 \cos ^{-1} x$,જ્યાં $\frac{1}{\sqrt{2}} \leq x \leq 1$.

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