Solve the Equation for Exact Solutions Over the Interval [0 $\tan x + \sec x = 1$

Solve the equation for exact solutions over the interval [0, 2π) .
- $\tan x + \sec x = 1$

A) $\left\{ \frac { \pi } { 4 } \right\}$
B) $\varnothing$
C) $\left\{ \frac { 5 \pi } { 4 } \right\}$
D) $\{ 0 \}$