Use Identities to find the exact value.
-$\cos 36 ^ { \circ } \cos 24 ^ { \circ } - \sin 36 ^ { \circ } \sin 24 ^ { \circ }$
A) 1
B) $\frac { \sqrt { 2 } } { 2 }$
C) $\frac { 1 } { 2 }$
D) $\frac { \sqrt { 3 } } { 2 }$

Question

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The Answer of Use Identities to find the exact value.
-$\cos 36 ^ { \circ } \cos 24 ^ { \circ } - \sin 36 ^ { \circ } \sin 24 ^ { \circ }$
A) 1
B) $\frac { \sqrt { 2 } } { 2 }$
C) $\frac { 1 } { 2 }$
D) $\frac { \sqrt { 3 } } { 2 }$

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 }cos36∘cos24∘−sin36∘sin24∘

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