Unit circle equation

The set of points at distance one from the origin in the plane, which is the unit circle centred at the origin. It is the standard reference circle used for trigonometric functions and in many geometric calculations.

x^2 + y^2 = 1

What the symbols mean

horizontal coordinate of a point on the circle
vertical coordinate of a point on the circle

About this formula

  • FieldMathematics
  • TopicAnalytic geometry
  • LevelHigh school
  • Also calledequation of unit circle, circle of radius one equation, circle radius 1 equation, unit circle formula, unit circle in cartesian coordinates
  • SourceWikidata Q203425

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