definite-integral

Question: $\int_{0}^{\pi /4}{{{\sec }^{7}}\theta {{\sin }^{3}}\theta }\,d\theta =$



1) $\frac{1}{12}$
2) $\frac{3}{12}$
3) $\frac{5}{12}$
4) None of these
Solution: Explanation: No Explanation
Fundamental definite integration Definite integration by substitution

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