If X = 5 Sin $\theta$ , Use Trigonometric Substitution to Write

Multiple Choice

If x = 5 sin $\theta$ , use trigonometric substitution to write $\sqrt { 25 - x ^ { 2 } }$ as a trigonometric function of $\theta$ , where $- \frac { \pi } { 2 } < \theta < \frac { \pi } { 2 }$ .

A) 5 sin $\theta$
B) 5 cos $\theta$
C) 5 tan $\theta$
D) 5 csc $\theta$
E) 5 sec $\theta$