Solve Apps: Trigonometric Equations
-The Range $\mathrm { r }$ Of a Projectile Is Given By

Solve Apps: Trigonometric Equations
-The range $\mathrm { r }$ of a projectile is given by $\mathrm { r } = \frac { 1 } { 32 } \mathrm { v } ^ { 2 } \sin 2 \theta$ , where $\mathrm { v }$ is the initial velocity and $\theta$ is the angle of elevation. If $r$ is to be $9000 \mathrm { ft }$ and $\mathrm { v } = 5000 \mathrm { ft } / \mathrm { sec }$ , what must the angle of elevation be? Give your answer in degrees to the nearest hundredth.

A) $0.33 ^ { \circ }$
B) $89.67 ^ { \circ }$
C) $0.66 ^ { \circ }$
D) $0.46 ^ { \circ }$