ધારો કે $f : R \rightarrow R$ એક વિકલનીય વિધેય છે જેથી $f \left(\frac{\pi}{4}\right)=\sqrt{2}$,$f \left(\frac{\pi}{2}\right)=0$ અને $f^{\prime}\left(\frac{\pi}{2}\right)=1$ થાય. જો $g(x)=\int\limits_{x}^{\pi / 4}\left(f^{\prime}(t) \sec t+\tan t \sec t f(t)\right) d t$ એ $x \in\left[\frac{\pi}{4}, \frac{\pi}{2}\right)$ માટે હોય,તો $\lim\limits _{ x \rightarrow\left(\frac{\pi}{2}\right)^{-}} g ( x )$ ની કિંમત શોધો.

  • A
    $2$
  • B
    $3$
  • C
    $4$
  • D
    $-3$

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