Question 1067735
.
It is NOT an identity.



{{{graph( 330, 330, -1.5, 6.5, -5.5, 5.5,
          (1+sin(x))/cos(x), (sin(x) - cos(x) + 1)/(sin(x) + cos(x) + 1)
)}}}



Plot y = {{{(1+sin(x))/cos(x)}}} (red, the left side) and y = {{{(sin(x) - cos(x) + 1)/(sin(x) + cos(x) + 1)}}} (green, the right side)