Point P Is on the Terminal Side of θ $\mathrm { P } ( 5 , - 8 )$

Point P is on the terminal side of θ . Evaluate the six trigonometric functions for θ. If the function is undefined, write "undefined."
- $\mathrm { P } ( 5 , - 8 )$ ; find $\cos \theta$ .

A) $\frac { 5 \sqrt { 89 } } { 89 }$
B) $- \frac { 5 } { 8 }$
C) $\frac { 8 \sqrt { 89 } } { 89 }$
D) $\frac { \sqrt { 89 } } { 5 }$

Correct Answer:

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