CASTI-89 TITANIUM · CALC89
R▶Pθ(
Converts rectangular coordinates to the polar angle θ, in the current angle mode.
Syntax
R▶Pθ(x, y)
- Group
- Trigonometry
- Arguments
- Takes the coordinates x and y.
- Availability
- Included
- Menu path
- MATH ▸ Angle ▸ R◀▶P ▸ R▶Pθ(
Example
| Input | Result |
|---|---|
| R▶Pθ(1,1) | π/4 |
Typing R▶Pθ(1,1) on the home screen and pressing ENTER returns π/4.
Keystrokes on the TI-89 Titanium
2NDMATH2▶×32
The same key sequence inserts R▶Pθ( in Calc89, and the AI tutor shows it step by step on the on-screen keypad.
Related commands
- sec(Returns the secant of an angle, interpreted in the current angle mode.
- sech(Returns the hyperbolic secant of a value.
- sech⁻¹(Returns the inverse hyperbolic secant of a value.
- sec⁻¹(Returns the angle whose secant is the given value, in the current angle mode.
- sin(Returns the sine of an angle, interpreted in the current angle mode.
- sinh(Returns the hyperbolic sine of a value.
- sinh⁻¹(Returns the inverse hyperbolic sine of a value.
- sin⁻¹(Returns the angle whose sine is the given value, in the current angle mode.