Texas Instruments TI-80 User Manual - Page 91

ZDECIMAL ZSQUARE ZSTANDARD ZTRIG ZDECIMAL replots the functions immediately, updates the Window variables to preset values that set @X and @Y equal to .1, and defines the X and Y value of each pixel as one decimal. XMIN = L3 . 1 XMAX = 3.1 XSCL = 1 YMIN = L2 . 3 YMAX = 2.3 YSCL = 1 ZSQUARE replots the functions immediately, redefining the window based on the current Window variables, but adjusted in only one direction so that @X=@Y. This makes the graph of a circle look like a circle. XSCL and YSCL remain unchanged. The midpoint of the current graph (not the intersection of the axes) becomes the midpoint of the new graph. ZSTANDARD replots the functions immediately, updating the Window variables to the standard values: XMIN = L10 XMAX = 10 XSCL = 1 YMIN = L10 YMAX = 10 YSCL = 1 ZTRIG replots the functions immediately, updating the Window variables to preset values appropriate for plotting trig functions. In RADIAN mode, these are: XMIN = L(31/12)p (L8.115781..) XMAX = (31/12)p (8.1157810..) XSCL = (p/2) (1.5707963..) YMIN = L2 ( L2 ) YMAX = 2 ( 2 ) YSCL = 1 (1) Function Graphing 4-17