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Evaluate the following integral ∫_0^(π⁄2)〖〖cos〗^2 x〗 dx
Q:

Evaluate the following integral ∫_0^(π⁄2)〖〖cos〗^2 x〗 dx

0

Evaluate  the following integral ∫_0^(π⁄2)〖〖cos〗^2 x〗 dx      

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∫_0^(π⁄2)〖〖cos〗^2 x〗 dx=1/2 ∫_0^(π⁄2)(1+cos⁡2x )  dx=1/2 [x+1/2  sin⁡2x ]_0^(π⁄2)=π/4

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