Solve the problem.
-$\cos 35 ^ { \circ } \sin 55 ^ { \circ } + \sin 35 ^ { \circ } \cos 55 ^ { \circ }$
A) -1
B) 2
C) 0
D) 1

Name: Solve the problem. -$\cos 35 ^ { \circ } \sin 55 ^ { \circ } + \sin 35 ^ { \circ } \cos 55 ^ { \circ }$ A) -1 B) 2 C) 0 D) 1
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Question

Quizplus · Accepted Answer

This expression can be simplified using the sine addition formula: $\sin(A + B) = \sin A \cos B + \cos A \sin B$. Here, $A = 35^\circ$ and $B = 55^\circ$, so the expression simplifies to $\sin(35^\circ + 55^\circ) = \sin(90^\circ)$, which equals 1.

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Solve the Problem $\cos 35 ^ { \circ } \sin 55 ^ { \circ } + \sin 35 ^ { \circ } \cos 55 ^ { \circ }$