Use Identities to Find the Indicated Value for Each Angle $\cos 2 \theta = - \frac { 7 } { 9 }$

question 175

Multiple Choice

Use identities to find the indicated value for each angle measure.
- $\cos 2 \theta = - \frac { 7 } { 9 }$ and $\frac { \pi } { 2 } < \theta < \pi \quad$ Find $\sin \theta$ .

• A) \(\sin \theta = \frac { 2 \sqrt { 2 } } { 3 }\)
• B) \(\sin \theta = - \frac { 2 \sqrt { 2 } } { 3 }\)
• C) \(\sin \theta = \frac { 3 \sqrt { 2 } } { 4 }\)
• D) \(\sin \theta = 0\)

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