Posted by Haley on .
#1 cos x+sec x=2
#2 (1+tan x)^2= 2 tan x+2
#3 cos^2xsin^2 x+1=cos x
please show all work & thanks

precalc help !!!!!!! 
Damon,
cos x + 1/cos x = 2
cos^2 x 2 cos x + 1 = 0
(cos x  1)(cos x  1) = 0
cos x = 1
x = 0
Now you do some