To illustrate, type in the following commands, which plot the function f(x) = sin(x²) over the interval [0,p].

>> x = linspace(0, pi); >> y = sin(x.^2); >> plot(x,y); grid >> zoom on % just zoom works here too 

Now clicking in the figure window will cause the graph to be redrawn over a smaller domain.

Click near the smallest positive x in this interval where f(x)=0. (The positive x-value where the graph first crosses the x axis). What is the length of the interval shown on the y axis?

Enter a number: