Appendix A: Functions and Instructions 501
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 501 of 132
simult(coeffMatrix, constMatrix[, tol]) ⇒ matrix
Solves multiple systems of linear equations,
where each system has the same equation
coefficients but different constants.
Each column in constMatrix must contain the
constants for a system of equations. Each
column in the resulting matrix contains the
solution for the corresponding system.
Solve: x + 2y = 1 x + 2y = 2
3x + 4y = ë1 3x + 4y = ë3
simult([1,2;3,4],[1,2;ë1,ë3])
¸
[ë3 ë7
2 9/2]
For the first system, x=ë3 and y=2. For
the second system, x=ë7 and y=9/2.
sin() TI-89: 2W key TI-92 Plus: W key
sin(expression1) ⇒ expression
sin(list1) ⇒ list
sin(expression1) returns the sine of the
argument as an expression.
sin(list1) returns a list of the sines of all
elements in list1.
Note: The argument is interpreted as either a
degree or radian angle, according to the
current angle mode. You can use óor ôto
override the angle mode setting temporarily.
In Degree angle mode:
sin((p/4)ô) ¸‡2
2
sin(45) ¸‡2
2
sin({0,60,90}) ¸{0 ‡3
2 1}
In Radian angle mode:
sin(p/4) ¸‡2
2
sin(45¡) ¸‡2
2
sin(squareMatrix1) ⇒ squareMatrix
Returns the matrix sine of squareMatrix1. This
is not the same as calculating the sine of each
element. For information about the
calculation method, refer to cos().
squareMatrix1 must be diagonalizable. The
result always contains floating-point
numbers.
In Radian angle mode:
sin([1,5,3;4,2,1;6,ë2,1]) ¸
.942… ë.045… ë.031…
ë.045… .949… ë.020…
ë.048… ë.005… .961…
sinê() TI-89: ¥ Qkey TI-92 Plus: 2 Q key
sinê(expression1) ⇒ expression
sinê(list1) ⇒ list
sinê(expression1) returns the angle whose
sine is expression1 as an expression.
sinê(list1) returns a list of the inverse sines of
each element of list1.
Note: The result is returned as either a
degree or radian angle, according to the
current angle mode setting.
In Degree angle mode:
sinê(1) ¸90
In Radian angle mode:
sinê({0,.2,.5}) ¸
{0 .201... .523...}