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Use Identities to Find the Exact Value cos⁡36∘cos⁡24∘−sin⁡36∘sin⁡24∘\cos 36 ^ { \circ } \cos 24 ^ { \circ } - \sin 36 ^ { \circ } \sin 24 ^ { \circ }

Question 482

Multiple Choice

Use Identities to find the exact value.
- cos⁡36∘cos⁡24∘−sin⁡36∘sin⁡24∘\cos 36 ^ { \circ } \cos 24 ^ { \circ } - \sin 36 ^ { \circ } \sin 24 ^ { \circ }


A) 1
B) 22\frac { \sqrt { 2 } } { 2 }
C) 12\frac { 1 } { 2 }
D) 32\frac { \sqrt { 3 } } { 2 }

Correct Answer:

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