\( \int_{0}^{\pi / 2} \frac{d x}{1+\tan ^{3} x} \) is :
\( \mathrm{P} \)
(A) 0
(B) 1
(C) \( \fra...
\( \int_{0}^{\pi / 2} \frac{d x}{1+\tan ^{3} x} \) is :
\( \mathrm{P} \)
(A) 0
(B) 1
(C) \( \frac{\pi}{2} \)
(D) \( \frac{\pi}{4} \)
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