when a graph of the equation y= 4* sin(x) is drawn the graph looks like result of a graphical calculator when given this equation
it looks like a , normal harmonic wave but when the equation y= 4 sin(90*x) is drawn on a graph the wave looks like a super-position result of a graphing calculator when given this equation
and at y=4*sin(100000x) the super position is not observed .
That's just a result of the graphics.