Please Help me in solving this problem , Please don't tell answer... Tell method here (I know only 12th class calculus)

It is needed while I 'am solving time period of an pendulum in doing semicircular motion in gravity .....

\(\displaystyle{\int _{ 0 }^{ \cfrac { \pi }{ 2 } }{ \cfrac { dx }{ \sqrt { \cos { x } } } } }\)

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TopNewestSee equation 14 and apply Euler's Reflection Formula.

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@Mvs Saketh @Ronak Agarwal @Shashwat Shukla

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