Texas Instruments TI-89, TI-92 - page 456

Appendix A: Functions and Instructions 439
8992APPA.DOC TI-89 / TI-92 Plus: Appendix A (US English) Susan Gullord Revised: 02/23/01 1:48 PM Printed: 02/23/01 2:21 PM Page 439 of 132
dotP() MATH/Matrix/Vector ops menu
dotP(list1, list2) ⇒ expression
Returns the “dot” product of two lists.
dotP({a,b,c},{d,e,f}) ¸
aø
d
+
b
øe + cøf
dotP({1,2},{5,6}) ¸17
dotP(vector1, vector2) ⇒ expression
Returns the “dot” product of two vectors.
Both must be row vectors, or both must be
column vectors.
dotP([a,b,c],[d,e,f]) ¸
aød + bøe + cøf
dotP([1,2,3],[4,5,6]) ¸32
DrawFunc CATALOG
DrawFunc expression
Draws expression as a function, using x as the
independent variable.
Note: Regraphing erases all drawn items.
In function graphing mode and ZoomStd
window:
DrawFunc 1.25xùcos(x) ¸
DrawInv CATALOG
DrawInv expression
Draws the inverse of expression by plotting x
values on the y axis and y values on the x
axis.
x is the independent variable.
Note: Regraphing erases all drawn items.
In function graphing mode and ZoomStd
window:
DrawInv 1.25xùcos(x) ¸
DrawParm CATALOG
DrawParm expression1, expression2
[, tmin] [, tmax] [, tstep]
Draws the parametric equations expression1
and expression2, using t as the independent
variable.
Defaults for tmin, tmax, and tstep are the
current settings for the Window variables
tmin, tmax, and tstep. Specifying values does
not alter the window settings. If the current
graphing mode is not parametric, these three
arguments are required.
Note: Regraphing erases all drawn items.
In function graphing mode and ZoomStd
window:
DrawParm
tùcos(t),tùsin(t),0,10,.1 ¸