Trig functions need help

[From: ] [author: ] [Date: 12-11-06] [Hit: ]

how does (1+cos(y)) / (1+sec (y)) = cos(y)
can anyone explain the steps?

replace 1+sec(y)=1+(1/cos(y)) and simplify

keywords: help,Trig,functions,need,Trig functions need help