SOLUTION: Express the trigonometric function in terms of its positive acute reference angle. cos298°=

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Question 982958: Express the trigonometric function in terms of its positive acute reference angle.
cos298°=
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
The red arc indicates the angle 298°, the green arc indicates the reference angle
62°.  Since the angles in the 4th quadrant are positive cos(298°) = +cos(62°).

[But sin(298°) = -sin(62°), and tan(298°) = -tan(62°), because they are negative
in the 4th quadrant.




Edwin