Find the Exact Value of the Expression Using the Provided $\sin \theta$

question 123

Multiple Choice

Find the exact value of the expression using the provided information.
-Find $\sin \theta$ if $\sec \theta = - \frac { 8 } { 5 }$ and $\tan \theta < 0$ .

• A) \(- \frac { \sqrt { 39 } } { 8 }\)
• B) \(\frac { \sqrt { 39 } } { 8 }\)
• C) \(- \frac { 5 } { 8 }\)
• D) \(\frac { 39 } { 64 }\)

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