\[\int_{0}^{\pi /4}{{{\tan }^{6}}x{{\sec }^{2}}x\,dx=}\] [BIT Ranchi 1981]

\[\int_{0}^{\pi /4}{{{\tan }^{6}}x{{\sec }^{2}}x\,dx=}\]

1.	\[\int_{0}^{\pi /4}{{{\tan }^{6}}x{{\sec }^{2}}x\,dx=}\] [BIT Ranchi 1981]
A.	\[\frac{1}{7}\]
B.	\[\frac{2}{7}\]
C.	1
D.	None of these
Answer» B. \[\frac{2}{7}\]

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\[\int_{0}^{\pi /4}{{{\tan }^{6}}x{{\sec }^{2}}x\,dx=}\] [BIT Ranchi 1981]

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