HP 48gII hp 48gII_user's manual_English_E_HDPMSG48E67_V2.pdf - Page 405

X(t) = X0 + V0*COS(θ0)*t Y(t) = Y0 + V0*SIN(θ0)*t - 0.5*g*t^2 which will add the variables @@@Y@@@ and @@@X@@@ to the soft menu key labels. To produce the graph itself, follow these steps: • Press „ô, simultaneously if in RPN mode, to access to the PLOT SETUP window. • Change TYPE to Parametric, by pressing @CHOOS ˜˜@@@OK@@@. • Press ˜ and type 'X(t) + i*Y(t)' @@@OK@@@ to define the parametric plot as that of a complex variable. (The real and imaginary parts of the complex variable correspond to the x- and y-coordinates of the curve.) • The cursor is now in the Indep field. Press ³~„t @@@OK@@@ to change the independent variable to t. • Press L@@@OK@@@ to return to normal calculator display. • Press „ò, simultaneously if in RPN mode, to access the PLOT window (in this case it will be called PLOT -PARAMETRIC window). Instead of modifying the horizontal and vertical views first, as done for other types of plot, we will set the lower and upper values of the independent variable first as follows: • Select the Indep Low field by pressing ˜˜. Change this value to 0@@@OK@@@. Then, change the value of High to 2@@@OK@@@. Enter 0. 1@@@OK@@@ for the Step value (i.e., step = 0.1). Note: Through these settings we are indicating that the parameter t will take values of t = 0, 0.1, 0.2, ..., etc., until reaching the value of 2.0. • Press @AUTO. This will generate automatic values of the H-View and V-View ranges based on the values of the independent variable t and the definitions of X(t) and Y(t) used. The result will be: Page 12-24