જો $\int \frac{\cos x \, dx}{\sin ^{3} x \left(1+\sin ^{6} x\right)^{2 / 3}} = f(x) \left(1+\sin ^{6} x\right)^{1 / \lambda} + c$ જ્યાં $c$ એ સંકલનનો અચળાંક છે,તો $\lambda f\left(\frac{\pi}{3}\right)$ ની કિંમત શોધો.

  • A
    $-2$
  • B
    $-\frac{9}{8}$
  • C
    $2$
  • D
    $\frac{9}{8}$

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જો $\int \left( \frac{1-5 \cos^{2}x}{\sin^{5}x \cos^{2}x} \right) dx = f(x) + C$ જ્યાં $C$ એ સંકલનનો અચળાંક છે, તો $f(\frac{\pi}{6}) - f(\frac{\pi}{4})$ ની કિંમત શોધો.

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