$\sin \left[\tan ^{-1}\left(\frac{1-x^2}{2 x}\right)+\cos ^{-1}\left(\frac{1-x^2}{1+x^2}\right)\right]$ ની કિંમત શોધો.

  • A
    $0$
  • B
    $1$
  • C
    $-1$
  • D
    $\frac{1}{2}$

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સાબિત કરો કે $\tan ^{-1} \frac{1}{5}+\tan ^{-1} \frac{1}{7}+\tan ^{-1} \frac{1}{3}+\tan ^{-1} \frac{1}{8}=\frac{\pi}{4}$

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$(\sin^{-1} x)^3 + (\cos^{-1} x)^3$ ની ન્યૂનતમ અને મહત્તમ કિંમતો શોધો:

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$\tan ^{-1}(x+1)+\cot ^{-1}\left(\frac{1}{x-1}\right)=\tan ^{-1}\left(\frac{8}{31}\right)$ માટે $x$ ના શક્ય મૂલ્યોનો સરવાળો કેટલો થાય?

જો $\sin^{-1} x + \sin^{-1} y = \pi/2$ હોય, તો $x^2$ કોના બરાબર છે?

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