Use the Fundamental Identities to Find the Value of the Trigonometric

question 31

Multiple Choice

Use the fundamental identities to find the value of the trigonometric function.
-Find $\cos \theta$ , given that $\tan \theta = - \frac { 4 } { 7 }$ and $\sin \theta > 0$ .

• A) \(- \frac { \sqrt { 65 } } { 7 }\)
• B) \(\frac { \sqrt { 65 } } { 4 }\)
• C) \(\frac { 7 \sqrt { 65 } } { 65 }\)
• D) \(- \frac { 7 \sqrt { 65 } } { 65 }\)

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