Determine All Solutions of the Equation in Radians $\cos 2 \theta = \frac { 5 } { 6 }$

Multiple Choice

Determine all solutions of the equation in radians.
- $\cos 2 \theta = \frac { 5 } { 6 }$ and $\theta$ terminates in quadrant $\mathrm { I } \quad$ Find $\sin \theta$ .

A) $\sin \theta = \frac { \sqrt { 3 } } { 6 }$
B) $\sin \theta = 0$
C) $\sin \theta = 2 \sqrt { 3 }$
D) $\sin \theta = - \frac { \sqrt { 3 } } { 6 }$