Math Playground
Algebra

Odd & even functions

Mirror across the y-axis (even) or rotate around the origin (odd).

Symmetric functions come in two flavours.

The two

  • Even: f(−x) = f(x). Mirror across the y-axis. Examples: x², cos(x).
  • Odd: f(−x) = −f(x). Rotational symmetry about origin. Examples: x³, sin(x).