SOLUTION: given cos theta equals-3/5 with pi less than theta less than 3pi/2, find the exact value of tan(2theta)

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Question 928571: given cos theta equals-3/5 with pi less than theta less than 3pi/2, find the exact value of tan(2theta)
Answer by lwsshak3(11628) About Me  (Show Source):
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given cos theta equals-3/5 with pi less than theta less than 3pi/2, find the exact value of tan(2theta)
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reference angle x is in quadrant II where cos<0, sin<0
cosx=-3/5
sinx=-4/5
tanx=sin/cos=4/3