Precalculus Examples

$12 \sin (30)$

Step 1

The exact value of $\sin (30)$ is $\frac{1}{2}$ .

$12 (\frac{1}{2})$

Step 2

Cancel the common factor of $2$ .

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Step 2.1

Factor $2$ out of $12$ .

$2 (6) \frac{1}{2}$

Step 2.2

Cancel the common factor.

$2 \cdot 6 \frac{1}{2}$

Step 2.3

Rewrite the expression.

$6$

$6$

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