Use a sum or difference identity to find the exact value.
-$\cos 34 ^ { \circ } \sin 25 ^ { \circ }$
A) $\frac { 1 } { 2 } \left( \cos 59 ^ { \circ } + \cos 9 ^ { \circ } \right)$
B) $\frac { 1 } { 2 } \left( \sin 59 ^ { \circ } - \sin 9 ^ { \circ } \right)$
C) $\frac { 1 } { 2 } \left( \sin 59 ^ { \circ } + \sin 9 ^ { \circ } \right)$
D) $\frac { 1 } { 2 } \left( \cos 59 ^ { \circ } - \cos 9 ^ { \circ } \right)$

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The Answer of Use a sum or difference identity to find the exact value.
-$\cos 34 ^ { \circ } \sin 25 ^ { \circ }$
A) $\frac { 1 } { 2 } \left( \cos 59 ^ { \circ } + \cos 9 ^ { \circ } \right)$
B) $\frac { 1 } { 2 } \left( \sin 59 ^ { \circ } - \sin 9 ^ { \circ } \right)$
C) $\frac { 1 } { 2 } \left( \sin 59 ^ { \circ } + \sin 9 ^ { \circ } \right)$
D) $\frac { 1 } { 2 } \left( \cos 59 ^ { \circ } - \cos 9 ^ { \circ } \right)$

Use a Sum or Difference Identity to Find the Exact cos⁡34∘sin⁡25∘\cos 34 ^ { \circ } \sin 25 ^ { \circ }cos34∘sin25∘

Use a Sum or Difference Identity to Find the Exact $\cos 34 ^ { \circ } \sin 25 ^ { \circ }$