Question

What is the value of cos²π/2

Answer 1

$\huge \fcolorbox{red}{pink}{Solution :)}$

Given ,

The trigonometric function is cos²(π/2)

We know that ,

(π/2) radian = (90)° degrees

Thus ,

$\sf \hookrightarrow { \cos}^{2}(90) \\ \\ \sf \hookrightarrow {( \cos(90))}^{2} \\ \\ \sf \hookrightarrow {(0)}^{2} \\ \\ \sf \hookrightarrow0$

Hence , cos²(π/2) = 0

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