Algebra Examples

$y = \tan^{-1} (x)$

Step 1

The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

Interval Notation:

$(- \infty, \infty)$

Set-Builder Notation:

${x | x \in ℝ}$

Step 2

The range is the set of all valid

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

Interval Notation:

$(- \frac{π}{2}, \frac{π}{2})$

Set-Builder Notation:

${y | - \frac{π}{2} < y < \frac{π}{2}}$

Step 3

Determine the domain and range.

Domain:

$(- \infty, \infty), {x | x \in ℝ}$

Range:

$(- \frac{π}{2}, \frac{π}{2}), {y | - \frac{π}{2} < y < \frac{π}{2}}$

Step 4