જો $\sec ^{-1}\left(\frac{5}{x}\right)+\sin ^{-1} \left(\frac{4}{5}\right)=\frac{\pi}{2}$,જ્યાં $x \neq 0$,તો $x=$ . . . . . . .

  • A
    $3$
  • B
    $1$
  • C
    $5$
  • D
    $4$

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જો $\sin ^{-1} x+\sin ^{-1} y+\sin ^{-1} z=\frac{3 \pi}{2}$ હોય, તો $x^{9}+y^{9}+z^{9}-\frac{1}{x^{9} y^{9} z^{9}}$ ની કિંમત કેટલી થાય?

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${\tan ^{ - 1}}\left( \frac{{2x}}{{1 - {x^2}}} \right)$ નું ${\sin ^{ - 1}}\left( \frac{{2x}}{{1 + {x^2}}} \right)$ ની સાપેક્ષ વિકલન સહગુણક શોધો.

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