SOLUTION: if cos theta = 4/5 and theta lies in quadrant IV, find sin(theta-pi)

SOLUTION: if cos theta = 4/5 and theta lies in quadrant IV, find sin(theta-pi)

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Question 968324: if cos theta = 4/5 and theta lies in quadrant IV, find sin(theta-pi)

Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
if cos theta = 4/5 and theta lies in quadrant IV, find sin(theta-pi)
cosx=4/5(Q4)
sinx=-3/5
sin(x-π)=sinxcosπ-cosxsinπ=-3/5*-1-4/5*0=3/5
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