Find the Exact Value $\cos 95 ^ { \circ } \cos 50 ^ { \circ } + \sin 95 ^ { \circ } \sin 50 ^ { \circ }$

question 77

Multiple Choice

Find the exact value. $\cos 95 ^ { \circ } \cos 50 ^ { \circ } + \sin 95 ^ { \circ } \sin 50 ^ { \circ }$

• A) \(\frac { 3 \sqrt { 2 } } { 2 }\)
• B) \(\frac { \sqrt { 2 } } { 2 }\)
• C) \(1\)
• D) \(- \frac { \sqrt { 3 } } { 2 }\)
• E) none

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