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

Question 982958: Express the trigonometric function in terms of its positive acute reference angle.
cos298�=
Answer by Edwin McCravy(20063) (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

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