###### Math

## The graphical illustration of sin(x+y)+sin(x-y)

There’s an fixed relationship between sin(x-y), sin(x) and sin(x+y). We can define a sequence from this. Moreover, we can draw some interesting figures.

There’s an fixed relationship between sin(x-y), sin(x) and sin(x+y). We can define a sequence from this. Moreover, we can draw some interesting figures.