Wave Form

y=a1.sin(x)+a2.sin(2x)+a3.sin(3x)+a4.sin(4x)+a5.sin(5x)+a6.sin(6x)

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a1
a2
a3
a4
a5
a6

Try different values for a1..a6
What happens if you make all the even ones 0? All the odd ones?

App generated by Geometry Expressions