Texas Instruments PLUS TI-89 - Manual (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 + bø e + cø f
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]) ¸
aø d + bø e + cø f
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 1.25xù cos(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 1.25xù cos(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
tù cos(t),tù sin(t),0,10,.1 ¸