SOLUTION: if tanθ = -3/4 90°<θ<180°, find cosθ
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Question 566972: if tanθ = -3/4 90°<θ<180°, find cosθ
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
if tanθ = -3/4 90°<θ<180°, find cosθ
you are working with a reference angle in quadrant II where tanθ-3/4
hypotenuse of right triangle=√(3^2+4^2)=√(9+16)=√25=5
cosθ=-4/5
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