જો $3 \cos ^{-1} x + \sin ^{-1} x = \pi$ હોય,તો $x = $ . . . . . . .

  • A
    $\frac{1}{\sqrt{2}}$
  • B
    $\frac{\sqrt{3}}{2}$
  • C
    $-\frac{1}{2}$
  • D
    $\frac{1}{2}$

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

માત્ર મુખ્ય કિંમતોને ધ્યાનમાં લેતા,જો $\tan (\cos ^{ - 1}x) = \sin [\cot ^{ - 1}(1/2)]$ હોય,તો $x$ ની કિંમત શોધો.

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

જો $y = \sin^{-1}(2x\sqrt{1-x^2})$ હોય અને $-\frac{1}{\sqrt{2}} < x < \frac{1}{\sqrt{2}}$ હોય,તો $\frac{dy}{dx}$ શોધો.

જો $\tan^{-1} 2x + \tan^{-1} 3x = \frac{\pi}{4}$ હોય,તો $x =$

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