B blitzen New member Joined Jan 7, 2011 Messages 14 Jan 10, 2011 #1 I have to prove the following: (1 + tan^2 u) / (1 - tan^2 u) = 1 / (cos^2 u - sin^2 u) I know that the numerator, (1 + tan^2 u) is equivalent to sec^2 u, but I do not know where to go from there.
I have to prove the following: (1 + tan^2 u) / (1 - tan^2 u) = 1 / (cos^2 u - sin^2 u) I know that the numerator, (1 + tan^2 u) is equivalent to sec^2 u, but I do not know where to go from there.
D Deleted member 4993 Guest Jan 10, 2011 #2 blitzen said: I have to prove the following: (1 + tan^2 u) / (1 - tan^2 u) = 1 / (cos^2 u - sin^2 u) I know that the numerator, (1 + tan^2 u) is equivalent to sec^2 u, but I do not know where to go from there. Click to expand... Then multiply the numerator and the denominator by cos[sup:suzxj04u]2[/sup:suzxj04u](u) OR Start by converting tan(u) = sin(u)/cos(u)
blitzen said: I have to prove the following: (1 + tan^2 u) / (1 - tan^2 u) = 1 / (cos^2 u - sin^2 u) I know that the numerator, (1 + tan^2 u) is equivalent to sec^2 u, but I do not know where to go from there. Click to expand... Then multiply the numerator and the denominator by cos[sup:suzxj04u]2[/sup:suzxj04u](u) OR Start by converting tan(u) = sin(u)/cos(u)
