Use the Fundamental Identities to Find the Value of the Trigonometric

question 77

Multiple Choice

Use the fundamental identities to find the value of the trigonometric function.
-Find $\cos \theta$ , given that $\tan \theta = - \frac { 10 } { 9 }$ and $\sin \theta > 0$ .

• A) \(- \frac { \sqrt { 181 } } { 9 }\)
• B) \(- \frac { 9 \sqrt { 181 } } { 181 }\)
• C) \(\frac { \sqrt { 181 } } { 10 }\)
• D) \(\frac { 9 \sqrt { 181 } } { 181 }\)

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