Trigonometry Examples

$y = \arcsin (X)$

Step 1

Set the argument in $\arcsin (X)$ greater than or equal to $- 1$ to find where the expression is defined.

$X \geq - 1$

Step 2

Set the argument in $\arcsin (X)$ less than or equal to $1$ to find where the expression is defined.

$X \leq 1$

Step 3

The domain is all values of $X$ that make the expression defined.

Interval Notation:

$[- 1, 1]$

Set-Builder Notation:

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

Step 4

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:

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

Step 5

Determine the domain and range.

Domain: $[- 1, 1], {X | - 1 \leq X \leq 1}$

Range: $[- \frac{π}{2}, \frac{π}{2}], {y | - \frac{π}{2} \leq y \leq \frac{π}{2}}$

Step 6