$\lim _{x \rightarrow \frac{\pi}{2}} \left(\frac{2x-\pi}{\cos x}\right)$ ની કિંમત શોધો.

  • A
    $0$
  • B
    $\frac{1}{2}$
  • C
    $-2$
  • D
    $5$

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ધારો કે $\alpha$ અને $\beta$ એવી વાસ્તવિક સંખ્યાઓ છે કે જેથી $\lim _{x \rightarrow 0} \frac{1}{x^3}\left(\frac{\alpha}{2} \int_0^x \frac{1}{1-t^2} d t+\beta x \cos x\right)=2$ થાય. તો $\alpha+\beta$ ની કિંમત $....$ છે. ($.40$ માં)

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$\lim _{x \rightarrow \frac{\pi}{4}} \frac{4 \sqrt{2}-(\cos x+\sin x)^5}{1-\sin 2 x} = $

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