CASTI-89 TITANIUM · CALC89
real(
Returns the real part of a complex number.
Syntax
real(expr)
- Group
- Number functions
- Arguments
- Takes one complex number or expression.
- Availability
- Included
- Menu path
- MATH ▸ Number ▸ CMPLX ▸ real(
Example
| Input | Result |
|---|---|
| real(3+4ⅈ) | 3 |
Typing real(3+4ⅈ) on the home screen and pressing ENTER returns 3.
Keystrokes on the TI-89 Titanium
2NDMATH1▶2
The same key sequence inserts real( in Calc89, and the AI tutor shows it step by step on the on-screen keypad.
Related commands
- remain(Returns the remainder of a divided by b, with the sign of a.
- root(Returns the n-th root of a value, for example the cube root for n=3.
- round(Rounds a value to a given number of decimal places.
- sign(Returns the sign of a value: 1 for positive and −1 for negative numbers.
- √(Returns the square root of a value.
- abs(Returns the absolute value of a number, or the modulus of a complex number.
- angle(Returns the argument of a complex number, the angle of its point in the complex plane.
- ans(Recalls a previous answer from the home screen history: ans(1) is the last answer, ans(2) the one before.