Use the Fundamental Identities to Find the Value of the Trigonometric

question 158

Multiple Choice

Use the fundamental identities to find the value of the trigonometric function.
- $\cos \omega$ , if $\tan \omega = - \frac { 2 } { 7 }$ and $\sin \omega > 0$

• A) \(- \frac { \sqrt { 53 } } { 7 }\)
• B) \(\frac { 7 \sqrt { 53 } } { 53 }\)
• C) \(\frac { \sqrt { 53 } } { 2 }\)
• D) \(- \frac { 7 \sqrt { 53 } } { 53 }\)

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