SOLUTION: The point (-4,6) is on the terminal side of (theta) in standard position. What is the cosine of (theta)?

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Question 973865: The point (-4,6) is on the terminal side of (theta) in standard position. What is the cosine of (theta)?
Answer by lwsshak3(11628) About Me  (Show Source):
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The point (-4,6) is on the terminal side of (theta) in standard position. What is the cosine of (theta)?
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Hypotenuse of reference right triangle in quadrant II=√(4^2+6^2)=√(16+36)=√52
cos(theta)=-4/√52=-(4√52)/52