Use Identities to Find the Indicated Value for Each Angle $\cos \theta = - \frac { 5 } { 13 } , \frac { \pi } { 2 } < \theta < \pi \quad$

Use identities to find the indicated value for each angle measure.
- $\cos \theta = - \frac { 5 } { 13 } , \frac { \pi } { 2 } < \theta < \pi \quad$ Find $\cos ( 2 \theta )$

A) $- \frac { 120 } { 169 }$
B) $- \frac { 119 } { 169 }$
C) $\frac { 120 } { 169 }$
D) $\frac { 119 } { 169 }$

Correct Answer:

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