Simplify $\sin (x - y) \cos y + \cos (x - y) \sin y.$
Question:
Simplify $\sin (x - y) \cos y + \cos (x - y) \sin y.$
Answer:
Let's think step by step.

user
\sin x
Simplify $\sin (x - y) \cos y + \cos (x - y) \sin y.$
train