Precalculus Examples

$f (x) = \cos (\frac{6 π}{5})$

Step 1

Evaluate $\cos (\frac{6 π}{5})$ .

$f (x) = - 0.80901699$

Step 2

The function is even because $f (- x) = f (x)$ .

The function is even

Step 3

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