[quote]other student learning difficulty and suggestion for applet ?
the other part is the area under the curve "A*sin(w*t)" to ("A*sin(w*t)")^2 is half of the rectangle form by A*A and the period T. student cannot visualize this i feel.[/quote]
Let's calculate the average on both side.
The average of should be the same as average of
And the sum of the above two average is
So the average of equal to