Infix Calculator works like a physical scientific calculator. Expressions are entered like they would be written.
To change the mode, enable/disable
When an expression is evaluated successfully, its result is stored in variable ans (Last Answer). Pressing the [+],[−],[×], or [÷] keys when the cursor is at the beginning of the expression will insert ans at the beginning of the expression. To prevent this from happening for negation, press [INV] then [()].
C, CA  Clear/Clear All [CA] Clears last answer as well as all userdefined variables. 
▲ ▼  Previous/Next Expression 
< >  Move Cursor Left/Right 
Delete 
The topmost area is the list of all previous evaluations. This list can be scrolled. Scroll down to hide all buttons. To show the buttons again, scroll up, click the input box, or press [BACK] on your device.
Click on any evaluation to change the display mode. Possible display modes are as follows:
Real Numbers  

Normal Mode  Displays numbers as decimals. 
Fraction Mode  Displays numbers as improper fractions when possible. If fractions are approximated, they will be displayed mixed. 
Mixed Fraction Mode  Displays numbers as mixed fractions when possible. 
Complex Numbers  

Complex Form a+bi  Displays complex numbers in the form a+bi. 
Fraction Mode  Displays complex numbers in the form a+bi as fractions, e.g.: 2/3+4/5i 
Complex Form re^Θi  Displays complex numbers in polar form, e.g.: 1.0 e^{0.7853981633974482i} 
12)(3+4 = (12)*(3+4)
(12(3+4 = 12*(3+4)
Numbers are stored internally as fractions when possible. There is no separate fraction button to enter fractions. Use the Divide key [÷] to enter fractions. Numbers up to 6 decimal places in length are also converted into fractions.
A, B, C, X, Y, Z 
Userdefined VariablesCan be modified by pressing [STO] followed by variable in calculator, or by using the sto() function. Can be fractions, complex numbers, and real numbers. 
x, y, z, t, v, r, θ m 
Volatile VariablesModified by graphing and table features such as tracing.

ANS  Last AnswerIn Infix Calculator, result of previous calculation is stored in this variable. Can be fraction, complex number, or real number. 
c, h, G  Physical ConstantsSpeed of Light, Planck's Constant, Gravitational Constant 
F, L, R  Chemical ConstantsFaraday, Avogadro, Gas Constant 
i, π or pi, phi  Mathematical ConstantsImaginary Unit, pi, Golden Ratio 
Angle Unit 
Adjusts measurement of angles. Applies to infix calculator, RPN calculator, graphs, and tables.
Current angle unit is indicated by last letter on button for each function. E.g.: sinr, cosr, tanr for radians. 
Complex Numbers 
Enable Complex Numbers. To adjust form of displayed complex numbers... 
Fraction ApproximationsEstimate fractions when interal fractions cannot be used. 

Vibrate 
Vibrate when a key is pressed. 
Live Calculation 
Calculate as an expression is entered. To register an expression, press the Equals [=] button. (Does not apply to RPN mode.) 
Math Errors  

Undefined 
An attempt was made to divide by zero.
Examples:

Domain 
The input of the function is outside the domain of the function.

Overflow 
Evaluation is outside maximum allowable range.

Nonreal Result 
In normal mode, a complex number occurred.

Singularity 
Function cannot be evaluated at the given input value.

Syntax Errors  

Syntax Error 
The expression is not wellformed.
Examples:

Reference 
A reference was made to a function or constant that does not exist.
In normal mode, a reference to a complex number also causes this error.

Invalid Type 
A attempt was made to use evaluate a realonly function with a complex argument.

© 2011 NIXON Development Corporation.