SOLUTION: 2cotx/1+cot^2(x)=sin2x

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Question 651946: 2cotx/1+cot^2(x)=sin2x
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
Prove
2cotx/(1+cot^2(x))=sin2x
start with left side
2cos/sin/(1+cos^2/sin^2)
2cos/sin/(sin^2+cos^2)/sin^2)
2cos/sin/(1/sin^2)
2sinxcosx=sin2x
verified: left side=right side