TI-89 Quick Reference

Key ® Sequence

Joy pad:Option








 
 
Power On
ON
Lighten
Diamond
® -
Approximation
Diamond
® Enter
Calculation Interrupt
ON
® ESC
 
Power Off
2nd
® OFF
Darken
Diamond
® +
Substitution
|
Cursor
Joy pad

Limits F3® Calc:limit
 
 


lim
x ® c		 f(x)     limit(f(x),x,c)

lim
x ® ¥		 f(x)    limit(f(x),x,¥)
¥ is keystroked as Diamond:Catalog

lim
x ® c+		 f(x)    limit(f(x),x,c,1)

lim
x ® c-		 f(x)    limit(f(x),x,c,-1)

Integrals F3® Calc:ò or 2nd®ò
 
 

ó
õ		 b

a

 f(x) dx    ó
õ		 (f(x),x,a,b)
ó
õ		 ¥

a

 f(x) dx    ó
õ		 (f(x),x,a,¥)
¥ is keystroked as Diamond:Catalog
ó
õ		 f(x) dx    ó
õ		 (f(x),x)

Series F3® Calc:å
 
 

m
å
n = k		 f(n)   å (f(n),n,k,m)
¥
å
n = k		 f(n)    å (f(n),n,k,¥)
¥ is keystroked as Diamond:Catalog

Derivatives F3® Calc:d or 2nd® d
 
 

x		 f(x)    d(f(x),x)
n
xn		 f(x)    d(f(x),x,n)

Taylor expansions F3® Calc:taylor
 
 

n
å
k = 0		 f (k)(a)
k!		 (x - a)k   taylor(f(x),x,n,a)
n
å
k = 0		 f (k)(0)
k!		 xk   taylor(f(x),x,n)

Differential equations F3® Calc:deSolve
 
 

y¢ = f(x,y)    deSolve(y¢ = f(x,y),x,y)
y¢ = f(x,y)  with  y(x0) = y0   deSolve(y'=f(x,y) and y(x0) = y0,x,y)

Setting graphing modes:
 
 


Cartesian Â2

MODE ® Graph:FUNCTION® ENTER

Diamond ® Y = ® set y = f(x).
 
Polar Â2

MODE ® Graph:POLAR® ENTER

Diamond ® Y = ® set r = f(q).
 

Parametric Â2

MODE ® Graph:PARAMETRIC® ENTER

Diamond ® Y = ® set x = f(t) and y = g(t).
 
Sequential Â2

MODE ® Graph:SEQUENCE® ENTER

Diamond ® Y = ® set u = f(n)
 

Cartesian Â3

MODE ® Graph:3D® ENTER

Diamond ® Y = ® set z = f(x,y).

Joy pad rotates Â3 surface
 
Cartesian Â2

MODE ® Graph:DIFF EQUATIONS ® ENTER

Diamond ® Y = ® set t0, y0  and  y¢ = f(t,y).

Diamond ® F:Fields:SLPFLD plots the slope field.
 

All modes support:

File translated from TEX by TTH, version 2.32.