User Manual

20050501
The “piecewise” function returns one value when an expression is true, and another value
when the expression is false.
The syntax of the “piecewise” function is shown below.
piecewise(<condition expression>, <return value when true>, <return value when false or
indeterminate>[ ) ]
or
piecewise(<condition expression>, <return value when true>, <return value when false>,
<return value when indeterminate>[ ) ]
Problem
Use this keyboard:
Operation
mth abc cat 2D
For the expression Func [piecewise] 0 X, 1,
0 < x (x = variable), return 1 2 , 0 w
when x is greater than 0,
2 when x is 0 or less, and 0
when x is undefined.
k Angle Symbol (∠)
Use this symbol to specify the coordinate format required by an angle in a vector.
You can use this symbol for a vector only.
Problem
Use this keyboard:
Operation
mth abc cat 2D
Convert the polar OPTN Func Change the [Angle] setting to
coordinates r = 2, “Radian”.
θ = π /4 to rectangular [toRect] [9 2 ),
coordinates. [1, 1] 7/ 4 )]w
k Derivative Symbol (’)
A single derivative symbol indicates the first derivative of an equation in the format:
<variable name>’.
Problem
Use this keyboard:
Operation
mth abc cat 2D
Solve the differential CALC SMBL Cmd [dSolve] Y =X,X
equation y’ = x. ,Yw
{y = 0.5 · x
2
+ const (1)}
2-4-10
Function Calculations