Use the Trigonometric Substitution to Rewrite the Algebraic Expression as a Trigonometric

Multiple Choice

Use the trigonometric substitution to rewrite the algebraic expression as a trigonometric function of $\theta$ , where $0 < x < \frac { \pi } { 2 }$ . $\sqrt { x ^ { 2 } + 25 } , x = 5 \tan \theta$

A) - 5 sec $\theta$
B) 5 tan $\theta$
C) 25 sec $\theta$
D) 25 tan $\theta$
E) 5 sec $\theta$