Posted by ama on Sunday, July 1, 2012 at 1:29pm.
Write each expression as sine, cosine, or tangent of an angle. Then find the exact value of the expression
tan 50tan20/1+ tan 50 tan20

precalculus  Steve, Sunday, July 1, 2012 at 5:33pm
since tan(AB) = (tanAtanB)/(1tanAtanB) I'd say you're looking at tan30 = 1/√3