Use Identities to Find the Indicated Value for Each Angle $\cos 2 \theta = \frac { 4 } { 5 }$

question 446

Multiple Choice

Use identities to find the indicated value for each angle measure.
- $\cos 2 \theta = \frac { 4 } { 5 }$ and $\theta$ terminates in quadrant I Find $\sin \theta$ .

• A) \(\sin \theta = - \frac { \sqrt { 10 } } { 10 }\)
• B) \(\sin \theta = 0\)
• C) \(\sin \theta = \frac { \sqrt { 10 } } { 10 }\)
• D) \(\sin \theta = \sqrt { 10 }\)

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