Texas Instruments TI-89 User Manual - Page 886

Table CATALOG Table expression1[, expression2] [, var1] In function graphing mode. Builds a table of the specified expressions or functions. Table 1.25xù cos(x) ¸ The expressions in the table can also be graphed. Expressions entered using the Table or Graph commands are assigned increasing function numbers starting with 1. The expressions can be modified or individually deleted using the edit functions available when the table is displayed by pressing † Header. The currently selected functions in the Y= Editor are temporarily ignored. Table cos(time),time ¸ To clear the functions created by Table or Graph, execute the ClrGraph command or display the Y= Editor. If the var parameter is omitted, the current graphmode independent variable is assumed. Some valid variations of this instruction are: Function graphing: Table expr, x Parametric graphing: Table xExpr, yExpr, t Polar graphing: Table expr, q Note: The Table command is not valid for 3D, sequence, or diff equations graphing. As an alternative, you may want to use BldData. tan( ) 2 Y key tan(expression1) ⇒ expression tan(list1) ⇒ list tan(expression1) returns the tangent of the argument as an expression. tan(list1) returns a list of the tangents of all elements in list1. Note: The argument is interpreted as a degree, gradian or radian angle, according to the current angle mode. You can use ó , G o r ô to override the angle mode setting temporarily. In Degree angle mode: tan((p/4)ô ) ¸ tan(45) ¸ tan({0,60,90}) ¸ In Gradian angle mode: 1 1 {0 ‡3 undef} tan((p/4)ô ) ¸ 200 • tan ( π 4 ) π tan(50) ¸ 1 tan({0,50,100}) ¸ {0 1 undef} In Radian angle mode: tan(p/4) ¸ 1 tan(45¡) ¸ 1 tan({p,p/3,-p,p/4}) ¸ {0 ‡3 0 1} 886 Appendix A: Functions and Instructions