Precalculus Examples

$\cos (x)$ , $x = \frac{π}{2}$

Step 1

Replace the variable $x$ with $\frac{π}{2}$ in the expression.

$\cos (\frac{π}{2})$

Step 2

The exact value of $\cos (\frac{π}{2})$ is $0$ .

$0$

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$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$