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\(\tan^6x\)

Calculus Level 3

\[\large \int_{-\pi/2}^{\pi/2} \frac{dx}{\tan^{6}x+1} = \ ? \]

\[2\pi\] \[\pi\] \[\frac{\pi} {2}\] 1 \[\frac{\pi} {4}\]

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by Hussain Alghazal

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