Find the Exact Value of the Indicated Trigonometric Function Of \theta

question 307

Multiple Choice

Find the exact value of the indicated trigonometric function of $\theta$
- $\cos \theta = \frac { 2 } { 5 } , \quad \tan \theta < 0$
Find $\sin \theta$ .

• A) \(- \frac { 3 } { 2 }\)
• B) \(- \frac { \sqrt { 5 } } { 2 }\)
• C) \(- \sqrt { 5 }\)
• D) \(- \frac { \sqrt { 21 } } { 5 }\)

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