The Point P(x, Y) on the Unit Circle That Corresponds $\left( - \frac { \sqrt { 39 } } { 8 } , \frac { 5 } { 8 } \right) \quad$

question 46

Multiple Choice

The point P(x, y) on the unit circle that corresponds to a real number t is given. Find the values of the indicated
trigonometric function at t.
- $\left( - \frac { \sqrt { 39 } } { 8 } , \frac { 5 } { 8 } \right) \quad$ Find $\cos \mathrm { t } .$

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

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