ધારો કે $f(t) = \int \left( \frac{1 - \sin(\ln t)}{1 - \cos(\ln t)} \right) dt$,$t > 1$ માટે. જો $f(e^{\pi/2}) = -e^{\pi/2}$ અને $f(e^{\pi/4}) = \alpha e^{\pi/4}$ હોય,તો $\alpha$ ની કિંમત શોધો.

  • A
    $-1 - \sqrt{2}$
  • B
    $-1 - 2\sqrt{2}$
  • C
    $1 + \sqrt{2}$
  • D
    $-1 + \sqrt{2}$

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જો $\int e^x \left( \frac{1 - \sin x}{1 - \cos x} \right) dx = f(x) + \text{constant}$ હોય,તો $f(x)$ ની કિંમત શોધો.

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