SOLUTION: If tanx=-2/3 and angle x is in second quadrant, what is the value of cosx?

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Question 1155092: If tanx=-2/3 and angle x is in second quadrant, what is the value of cosx?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If tan(t)=-2/3 and angle x is in second quadrant, what is the value of cos(t)?
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tan = y/x --> y = 2, x = -3 in Q2.
Find r
r = sqrt(x^2 + y^2)
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Then cos = x/r