J john-doe Member Joined Jul 29, 2012 Messages 179 Gender Male HSC 2012 Aug 5, 2012 #1 can someone show me the steps to prove this- (sinx)(siny)/(1+cosx)(1+cosy)= tan(x/2).tan(y/2) thanks
U umm what Banned Joined Nov 6, 2011 Messages 609 Location North Ryde Gender Female HSC N/A Aug 5, 2012 #3 use the half angle formulae for sin and cos (LHS)
J john-doe Member Joined Jul 29, 2012 Messages 179 Gender Male HSC 2012 Aug 5, 2012 #4 umm what said: when you expand top and bottom of LHS, use the half angle formulae for sin and cos Click to expand... thanks.!
umm what said: when you expand top and bottom of LHS, use the half angle formulae for sin and cos Click to expand... thanks.!
U umm what Banned Joined Nov 6, 2011 Messages 609 Location North Ryde Gender Female HSC N/A Aug 5, 2012 #5 john-doe said: thanks.! Click to expand... did you get the right answer?
