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

Question

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

Quizplus · Accepted Answer

The Answer of 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) $\frac { 119 } { 169 }$
B) $- \frac { 119 } { 169 }$
C) $\frac { 120 } { 169 }$
D) $- \frac { 120 } { 169 }$

Use Identities to Find the Indicated Value for Each Angle cos⁡θ=−513,π2<θ<π\cos \theta = - \frac { 5 } { 13 } , \frac { \pi } { 2 } < \theta < \pi \quadcosθ=−135​,2π​<θ<π

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