Expressions & functions05 / 68

Functions, constants & angle mode

Define a reusable rule once, then evaluate or graph it in other rows.

Find it

Expressions; Radians / Degrees in the sidebar footer

Try it step by step

Define a function such as .
Enter to calculate one value, or to draw the rule.
For a function with several inputs, define each argument and provide a value for every argument when calling it.
Choose the correct angle mode before interpreting trigonometric results.

Each card is one input. For definitions, enter the cards in order. Formula-only cards belong in the tool described above.

Define the rule.

Returns 5.

Define a two-input function.

Returns 25.

A wave of amplitude 2; use radians for the usual period of .

Named functions: Definitions can use existing parameters and other supported functions. Changes propagate to dependent rows.
Multiple inputs: A rule such as can be evaluated at a pair of values or used in a relation.
Radians / Degrees: Controls trigonometric arguments and polar angles. Radians are usually the right choice for calculus formulas involving sine and cosine.
Constants: Use and e; i is the imaginary unit in complex calculations.
Function values: Named lambdas, aliases, composition and partial application are covered in Advanced functions.