Texas Instruments TI-89 User Manual - Page 900

ZoomStd CATALOG ZoomStd Sets the window variables to the following standard values, and then updates the viewing window. Function graphing: x: [ë 10, 10, 1], y: [ë 10, 10, 1] and xres=2 Parametric graphing: t: [0, 2p, p/24], x: [ë 10, 10, 1], y:[ë 10, 10, 1] Polar graphing: q: [0, 2p, p/24], x: [ë 10, 10, 1], y: [ë 10, 10, 1] Sequence graphing: nmin=1, nmax=10, plotStrt=1, plotStep=1, x: [ë 10, 10, 1], y: [ë 10, 10, 1] 3D graphing: eyeq°=20, eyef°=70, eyeψ°=0 x: [ë 10, 10, 14], y: [ë 10, 10, 14], z: [ë 10, 10], ncontour=5 Differential equations graphing: t: [0, 10, .1, 0], x: [ë 1, 10, 1], y: [ë 10, 10, 1], ncurves=0, Estep=1, diftol=.001, fldres=14, dtime=0 ZoomSto CATALOG ZoomSto Stores the current Window settings in the Zoom memory. You can use ZoomRcl to restore the settings. ZoomTrig CATALOG ZoomTrig Displays the Graph screen, sets @x to p/24, and xscl to p/2, centers the origin, sets the y settings to [ë 4, 4, .5], and updates the viewing window. In function graphing mode: 1.25xù cos(x)! y1(x) ¸ ZoomStd ¸ In function graphing mode: 1.25xù cos(x)! y1(x) ¸ ZoomStd ¸ Done Done " ZoomTrig ¸ + (add) « key expression1 + expression2 ⇒ expression 56 ¸ 56 Returns the sum of expression1 and expression2. ans(1)+4 ¸ ans(1)+4 ¸ 60 64 ans(1)+4 ¸ 68 ans(1)+4 ¸ 72 900 Appendix A: Functions and Instructions