Precalculus Examples

$330 °$

Since the angle $330 °$ is in the fourth quadrant, the reference angle formula is $A_{r} = 360 ° - A_{c}$ .

$A_{r} = 360 ° - 330 °$

The reference angle is $A_{r} = 30 °$ .

$30 °$

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