CASCALC89 COMMAND · NOT ON THE TI-89
tangentLine(
Returns the equation of the tangent line to the graph of an expression at a point.
Syntax
tangentLine(expr, var, point)
- Group
- Calculus
- Arguments
- Takes the expression, the variable and the point.
- Availability
- Included
- Origin
- TI-Nspire CAS style command; the TI-89 Titanium handheld does not have it
Example
| Input | Result |
|---|---|
| tangentLine(x^2,x,1) | 2·x−1 |
Typing tangentLine(x^2,x,1) on the home screen and pressing ENTER returns 2·x−1.
Related commands
- taylor(Returns the Taylor polynomial of an expression up to a given order, around 0 or around a chosen point.
- Π(Computes the product of an expression as the variable runs from a lower to an upper value.
- Σ(Computes the sum of an expression as the variable runs from a lower to an upper value.
- ∫(Integrates an expression with respect to a variable.
- arcLen(Returns the arc length of the graph of an expression between two values of the variable.
- d(Differentiates an expression symbolically with respect to a variable.
- deSolve(Solves first and second order ordinary differential equations symbolically.
- dominantTerm(Returns the term of an expression that dominates near a point, for example as the variable tends to infinity.