Find the Exact Value of the Expression $\cot 45 ^ { \circ }$

Multiple Choice

Find the exact value of the expression.
- $\cot 45 ^ { \circ }$

A) $\frac { 2 \sqrt { 3 } } { 3 }$
B) $\frac { \sqrt { 2 } } { 2 }$
C) $\sqrt { 2 }$
D) 1