Find the Value Using the Unit Circle 330 degrees

$330 °$

Evaluate $\cos (330 °)$ .

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Apply the reference angle by finding the angle with equivalent trig values in the first quadrant.

$\cos (30)$

The exact value of $\cos (30)$ is $\frac{\sqrt{3}}{2}$ .

$\frac{\sqrt{3}}{2}$

Evaluate $\sin (330 °)$ .

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Apply the reference angle by finding the angle with equivalent trig values in the first quadrant. Make the expression negative because sine is negative in the fourth quadrant.

$- \sin (30)$

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

$- \frac{1}{2}$

Set up the coordinates $(\cos (θ), \sin (θ))$ .

$(\frac{\sqrt{3}}{2}, - \frac{1}{2})$

Find the Value Using the Unit Circle 330 degrees

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