Use an Inverse Trigonometric Function to Write $\theta$ As a Function of X

Multiple Choice

Use an inverse trigonometric function to write $\theta$ as a function of x.
A = x
B = 6

A) $\theta = \arctan \frac { 6 } { x }$
B) $\theta = \arccos \frac { x } { 6 }$
C) $\theta = \operatorname { arccot } \frac { x } { 6 }$
D) $\theta = \arcsin \frac { x } { 6 }$
E) $\theta = \arctan \frac { x } { 6 }$