Use the Cofunction Identities to Evaluate the Expression Below Without $$\cos ^ { 2 } 20 ^ { \circ } + \cos ^ { 2 } 57 ^ { \circ } + \cos ^ { 2 } 70 ^ { \circ } + \cos ^ { 2 } 33 ^ { \circ }$$

Multiple Choice

Use the cofunction identities to evaluate the expression below without the aid of a calculator. $$\cos ^ { 2 } 20 ^ { \circ } + \cos ^ { 2 } 57 ^ { \circ } + \cos ^ { 2 } 70 ^ { \circ } + \cos ^ { 2 } 33 ^ { \circ }$$

A) 1
B) 2
C) -1
D) 0
E) $\frac { 1 } { 2 }$