proving trigonometry

Submitted by aloe on Sun, 07/04/2010 - 17:43.

tan # + sec # -1
--------------------- = tan # +sec #
tan # - sec # + 1

# = teta

$\frac{\tan \theta+\sec \theta-1}{\tan \theta-\sec \theta+1}=\tan \theta+\sec \theta$