$x$ માટે ઉકેલો: $\tan^{-1}\left(\frac{1-x}{1+x}\right) = \frac{1}{2} \tan^{-1} x$,જ્યાં $x > 0$.

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

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જો $a_1, a_2, a_3, \dots, a_n$ સમાંતર શ્રેણીમાં હોય અને સામાન્ય તફાવત $d$ હોય, તો $\tan [\tan^{-1} (\frac{d}{1 + a_1a_2}) + \tan^{-1} (\frac{d}{1 + a_2a_3}) + \dots + \tan^{-1} (\frac{d}{1 + a_{n-1}a_n})] = $

જો $\tan ^{-1} x+\tan ^{-1} y+\tan ^{-1} z=\frac{\pi}{2}$ હોય, તો $1-x y-y z-z x$ ની કિંમત શોધો.

$\cot ^{-1}\left(\frac{1}{\sqrt{x^2-1}}\right)=$ . . . . . . જ્યાં,$x>1$.

જો $(\cos ^{-1} x)^2-(\sin ^{-1} x)^2 > 0$ હોય,તો

$\tan ^{-1} \left( \frac{\cos x}{1-\sin x} \right)$,$-\frac{3 \pi}{2} < x < \frac{\pi}{2}$ ને સાદા સ્વરૂપમાં દર્શાવો.

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