Texas Instruments TITANIUM TI-89 - Manual (Page 861)

Appendix A: Functions and Instructions 861
R 4444Pq qq q()
MATH/Angle menu
R 4444Pq qq q ( xExpression , yExpression )
⇒ ⇒ ⇒ ⇒ expression
R 4444Pq qq q ( xList , yList ) ⇒ ⇒ ⇒ ⇒ list
R 4444Pq qq q ( xMatrix , yMatrix )
⇒ ⇒ ⇒ ⇒ matrix
Returns the equivalent q-coordinate of the
( x,y ) pair arguments.
Note: The result is returned as a degree, gradian
or radian angle, according to the current angle
mode setting.
In Degree angle mode:
R8Pq(x,y) ¸
In Gradian angle mode:
R8Pq(x,y) ¸
In Radian angle mode:
R4Pq(3,2) ¸
R4Pq([3,-4,2],[0,pà4,1.5]) ¸
R 4444Pr()
MATH/Angle menu
R 4444Pr ( xExpression , yExpression )
⇒ ⇒ ⇒ ⇒ expression
R 4444Pr ( xList , yList )
⇒ ⇒ ⇒ ⇒ list
R 4444Pr ( xMatrix , yMatrix ) ⇒ ⇒ ⇒ ⇒ matrix
Returns the equivalent r -coordinate of the
( x,y ) pair arguments.
In Radian angle mode:
R4Pr(3,2) ¸
R4Pr(x,y) ¸
R4Pr([3,-4,2],[0,pà4,1.5]) ¸
4444Rad
CATALOG/MATH/Angle menu
4444 Rad expression
Converts an expression to radian angle measure.
In Degree angle mode:
1.5 4Rad ¸ .02618 R
In Gradian angle mode:
1.5 4Rad ¸ .023562 R
rand() MATH/Probability menu
rand([ n ])
⇒ ⇒ ⇒ ⇒ expression
n is an integer ƒ zero.
With no parameter, returns the next random
number between 0 and 1 in the sequence. When
an argument is positive, returns a random integer
in the interval [1,
n ].
When an argument is negative, returns a random
integer in the interval [ë
n ,ë 1].
RandSeed 1147 ¸ Done
rand() ¸ .158 ...
rand(6) ¸ 5
rand(л 100) ¸ л 49
(Sets the random-number)