We will concentrate on the first cycle to the right of the y-axis. Use CALC zero to find the x-intercepts. You will need to answer three questions during this process. To set the Left Bound, enter any value of x near but a little to the left of the x-intercept. The Right Bound can be any value of x near but a little to the right of the x-intercept. For the Guess, use a value of x that is close to the intercept itself. When the calculator asks each question, the graph is put into trace mode. Just type
in the value of x you want, and a prompt will appear as you do. For the first
intercept, we will use a left bound of π/2, a right bound of π, and a guess
of 2 (remember that the horizontal tick marks are multiples of π/2). Make sure the
x-values you enter when answering these questions are valid for the current
window (between Xmin and Xmax).
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