Write the Given Expression as the Cosine of an Angle $\cos 60 ^ { \circ } \cos 25 ^ { \circ } - \sin 60 ^ { \circ } \sin 25 ^ { \circ }$

Write the given expression as the cosine of an angle. $\cos 60 ^ { \circ } \cos 25 ^ { \circ } - \sin 60 ^ { \circ } \sin 25 ^ { \circ }$ ​

A) $\cos \left( 25 ^ { \circ } \right)$
B) $\cos \left( 85 ^ { \circ } \right)$
C) $\cos \left( 35 ^ { \circ } \right)$
D) $\cos \left( 60 ^ { \circ } \right)$
E) $\cos \left( - 50 ^ { \circ } \right)$

Correct Answer:

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