Definite Integration Question 234

Question: $ \int_0^{\pi /2}{{{\sin }^{5}}xdx=} $

Options:

A) $ \frac{8}{15} $

B) $ \frac{4}{15} $

C) $ \frac{8\sqrt{\pi }}{15} $

D) $ \frac{8\pi }{15} $

Show Answer

Answer:

Correct Answer: A

Solution:

$ \int_0^{\pi /2}{{{\sin }^{5}}xdx=\frac{\Gamma (3).\Gamma (1/2)}{2.\Gamma (7/2)}=\frac{8}{15}} $ .