A Security Car with Its Spotlight on Is Parked $a = 30$

Multiple Choice

A security car with its spotlight on is parked $a = 30$ meters from a warehouse.Consider θ and x as shown in the figure.Write θ as a function of x.​ ​

A) $\theta = \operatorname { arccot } \frac { x } { 30 }$
B) $\theta = \arctan \frac { x } { 30 }$
C) $\theta = \operatorname { arccsc } \frac { x } { 30 }$
D) $\theta = \arcsin \frac { x } { 30 }$
E) $\theta = \arctan \frac { 30 } { x }$