i have a waveform:
y2(x)= sin(x*1.2)+sin(x*1.8)
the first 6 nodes, meaning the parts of the wave where y2=0 come up on my graph at around x =
2.094
4.189
5.236
6.283
8.377
10.471
you can find the nodes easily (where y2=0) with either x = n*pi/(1.5) or x = (2n+1)*(pi/0.6), where n = 0, 1,2...