Question

$\displaystyle \int_0^{ \frac{\pi}{2} } cos^5 x\ dx = \:?\:$


Solve the math by " Wallie's theorem " with explanation.

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Answer 1

Answer:

$\pink{\displaystyle \int_0^{ \dfrac{\pi}{2} } cos^5 x\ dx = \dfrac{18}{5} }$

Step-by-step explanation:

See Attachment for Solution