Precalculus Examples

y = cos (x)

$y = \cos (x)$

Step 1

The range is the set of all valid

y

$y$ values. Use the graph to find the range.

Interval Notation:

[- 1, 1]

$[- 1, 1]$

Set-Builder Notation:

{y | - 1 \leq y \leq 1}

${y | - 1 \leq y \leq 1}$

Step 2

⎡ ⎢ ⎣ \begin{matrix} x^{2} & \frac{1}{2} \sqrt{π} & \int x d x \end{matrix} ⎤ ⎥ ⎦

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