Use the Information Given About the Angle $$\theta , 0 \leq \theta \leq 2 \pi$$

Use the information given about the angle $$\theta , 0 \leq \theta \leq 2 \pi$$ , to find the exact value of the indicated trigonometric function.
- $\cos \theta = - \frac { 5 } { 7 } , \quad \csc \theta < 0 \quad$ Find $\cos ( 2 \theta )$

A) $- \frac { 1 } { 49 }$

B) $\frac { 1 } { 49 }$

C) $\frac { 20 \sqrt { 6 } } { 49 }$

D) $\frac { - 20 \sqrt { 6 } } { 49 }$

Correct Answer:

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