Question

VERIFY THE IDENTITY
TAN^2X/SECX+1=1-COSX/COSX

Answer 1

tan^2x = sec^2x-1
so now you have sec^2x-1 / secx+1 = 1-cosx/cosx

Answer 2

from sin^2x + cos^2x = 1 you divide everything by cos^2x

Answer 3

which gives you tan^2x + 1 = sec^2x