A Boat Is Pulled in by Means of a Winch $a = 2$

Multiple Choice

A boat is pulled in by means of a winch located on a dock $a = 2$ feet above the deck of the boat (see figure) .Let $\theta$ be the angle of elevation from the boat to the winch and let s be the length of the rope from the winch to the boat.Write $\theta$ as a function of s.

A) $\theta = \operatorname { arccsc } \frac { 2 } { s }$
B) $\theta = \operatorname { arcsec } \frac { 2 } { s }$
C) $\theta = \arccos \frac { 2 } { s }$
D) $\theta = \arctan \frac { 2 } { s }$
E) $\theta = \arcsin \frac { 2 } { s }$