Use Sum and Difference Formulas for Cosines and Sines
- $\cos 15 ^ { \circ } \cos 45 ^ { \circ } - \sin 15 ^ { \circ } \sin 45 ^ { \circ }$

question 32

Multiple Choice

Use Sum and Difference Formulas for Cosines and Sines
- $\cos 15 ^ { \circ } \cos 45 ^ { \circ } - \sin 15 ^ { \circ } \sin 45 ^ { \circ }$

• A) \(\frac { 1 } { 2 }\)
• B) \(\frac { \sqrt { 3 } } { 2 }\)
• C) \(\frac { 1 } { 4 }\)
• D) \(\sqrt { 3 }\)

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