CASTI-89 TITANIUM · CALC89
tan(
Returns the tangent of an angle, interpreted in the current angle mode. For standard angles such as π/3 the result is exact.
Syntax
tan(expr)
- Group
- Trigonometry
- Arguments
- Takes one angle or expression.
- Availability
- Included
Example
| Input | Result |
|---|---|
| tan(π/3) | √(3) |
Typing tan(π/3) on the home screen and pressing ENTER returns √(3).
Keystrokes on the TI-89 Titanium
2NDTAN
The same key sequence inserts tan( in Calc89, and the AI tutor shows it step by step on the on-screen keypad.
Related commands
- tanh(Returns the hyperbolic tangent of a value.
- tanh⁻¹(Returns the inverse hyperbolic tangent of a value.
- tan⁻¹(Returns the angle whose tangent is the given value, in the current angle mode.
- cos(Returns the cosine of an angle, interpreted in the current angle mode.
- cosh(Returns the hyperbolic cosine of a value.
- cosh⁻¹(Returns the inverse hyperbolic cosine of a value.
- cos⁻¹(Returns the angle whose cosine is the given value, in the current angle mode.
- cot(Returns the cotangent of an angle, interpreted in the current angle mode.