Convert 150° to radians.
Hint
We want the degrees to cancel, so multiply by .
Answer
Convert 180° to radians.
Multiply by .
π
Convert radians to degrees.
Our conversion factor is .
270°
Find the reference angle for 315°.
Quadrant IV.
45°
Find the reference angle for 690°.
Subtract 360°, then figure out which quadrant you're in.
30°
Find the reference angle for
In Quadrant IV, ρ = 2π – ɵ.
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radians to degrees.
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