TRIGONOMETRIC FUNCTIONS Graphing And Analysis (Page 5 of 13)

If you want to evaluate the function at a specific x-value, use CALC value. Just enter the desired value of x and the calculator will display the corresponding y-coordinate and visually plot the point on the graph. The x-value entered must be valid for the current window (between Xmin and Xmax).

Let's evaluate the function for x = π/3.

 2nd CALC key. 1: menu selection. 2nd Pi key. Divide key. 3 ENTER key. Calculator screen image.

From the results, we see that f(π/3) is approximately 4.6. If x = 0 is within the current window, then the CALC value command can also be used to find the y-intercept.
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