Question

sin(x + y) + sin(x - y)​

Answer 1

Step-by-step explanation:

sin(x-y)+sin(x+y)

sin(x-y+x+y)

sin(x+x)

sin(2x)

sin2x

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Answer 2

Answer:

sinxcosy + cosxsiny + sinxcosy - cosxsiny

2sinxcosy

sin2x