વિધેય $\cos^{-1}(\sin x)$ નું $x$ ની સાપેક્ષમાં વિકલન કરો.

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

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

$x$ ના મૂલ્યોનો ગણ શોધો જેથી $\tan ^{-1}\left(\frac{x}{x-2}\right)-\tan ^{-1}\left(\frac{x}{2 x-1}\right)=\tan ^{-1}\left(\frac{2}{3}\right)$ થાય.

જો $\tan ^{-1}\left(\frac{x}{2}\right)+\tan ^{-1}\left(\frac{y}{2}\right)+\tan ^{-1}\left(\frac{z}{2}\right)=\frac{\pi}{2}$ હોય,તો $x y+y z+z x=$

જો $f(n) = \tan \left[\tan ^{-1} \frac{1}{1+2} + \tan ^{-1} \frac{1}{1+6} + \tan ^{-1} \frac{1}{1+12} + \ldots + \tan ^{-1} \frac{1}{1+n(n+1)}\right]$ હોય, તો $f(2021) =$

જો $y = \tan^{-1}\left(\frac{1}{x^2 + x + 1}\right) + \tan^{-1}\left(\frac{1}{x^2 + 3x + 3}\right) + \tan^{-1}\left(\frac{1}{x^2 + 5x + 7}\right) + \dots$ $n$ પદો સુધી હોય,તો $\frac{dy}{dx}$ ની કિંમત શોધો.

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