Solve the Equation on the Interval [0, 2π) $f ( x ) = \cos \theta - 1$

Multiple Choice

Solve the equation on the interval [0, 2π) .
-Suppose $f ( x ) = \cos \theta - 1$ . Solve $f ( x ) = 0$ .

A) $\frac { 3 \pi } { 2 }$
B) $\frac { \pi } { 2 }$
C) $\pi$
D) 0