SOLUTION: Find cos (theta) and sin (theta) if the terminal side of (theta) lies along the line y = - 2 x in quadrant IV.

SOLUTION: Find cos (theta) and sin (theta) if the terminal side of (theta) lies along the line y = - 2 x in quadrant IV.

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Question 383273: Find cos (theta) and sin (theta) if the terminal side of (theta) lies along the line y = - 2 x in
quadrant IV.
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
If the terminal side of lies along the line y = - 2 x in
quadrant IV, then . From the identity , we get , or , since secant is positive in the 4th quadrant. Then . From this we get .

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