HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 404

centered at the origin (0,0), will extend from -2 to 2 in x, and from -√3 to √3 in y. Notice that for the circle and the ellipse the region corresponding to the left and right extremes of the curves are not plotted. This is the case with all circles or ellipses plotted using Conic as the TYPE. • To see labels: @EDIT L@)LABEL @MENU • To recover the menu: LL@)PICT • To estimate the coordinates of the point of intersection, press the @(X,Y)@ menu key and move the cursor as close as possible to those points using the arrow keys. The coordinates of the cursor are shown in the display. For example, the left point of intersection is close to (-0.692, 1.67), while the right intersection is near (1.89,0.5). • To recover the menu and return to the PLOT environment, press L@CANCL. • To return to normal calculator display, press L@@@OK@@@. Parametric plots Parametric plots in the plane are those plots whose coordinates are generated through the system of equations x = x(t) and y = y(t), where t is known as the parameter. An example of such graph is the trajectory of a projectile, x(t) = x0 + v0⋅COS θ0⋅t, y(t) = y0 + v0⋅sin θ0⋅t - ½⋅g⋅t2. To plot equations like these, which involve constant values x0, y0, v0, and θ0, we need to store the values of those parameters in variables. To develop this example, create a subdirectory called 'PROJM' for PROJectile Motion, and within that sub-directory store the following variables: X0 = 0, Y0 = 10, V0 = 10 , θ0 = 30, and g = 9.806. Make sure that the calculator's angle measure is set to DEG. Next, define the functions (use „à): Page 12-23