Use the Fundamental Identities to Find the Value of the Trigonometric

question 430

Multiple Choice

Use the fundamental identities to find the value of the trigonometric function.
-Find $\sin \theta$ if $\sec \theta = - \frac { 8 } { 5 }$ and $\tan \theta < 0$

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

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