SOLUTION: Express cos 236 in terms of its reference angle. Make sure to show work.

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Question 1138126: Express cos 236 in terms of its reference angle.
Make sure to show work.
Answer by MathLover1(20850) About Me  (Show Source):
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Finding Reference Angles in Degrees
Quadrant | Measure of Angle Theta | Measure of Reference Angle
I | 0° to 90° |%09theta
II | 90° to 180° | 180+-theta°
III | 180° to 270° | theta+-180°
IV | 270° to 360° | 360-theta°

your angle 236 ° is in Quadrant III , and Reference Angle is theta+-+180°=236+-+180=56°
then
cos%28236+%29+=-cos%2856%29+