complementary angles

Two angles are called complementary anglesMathworldPlanetmath of each other, if their sum is the right angleMathworldPlanetmathPlanetmath π2, i.e. 90.

For example, the acute angles of a right triangleMathworldPlanetmath are complement angles of each other, since the angle sum in any triangle is 180.

The sine of an angle is equal to the cosine of the complement angle, and vice versa.

The tangent of an angle equals to the cotangent of the complement angle, and vice versa (provided that no one of the angles is a multiple of the straight angle).

Title complementary angles
Canonical name ComplementaryAngles
Date of creation 2013-03-22 17:18:07
Last modified on 2013-03-22 17:18:07
Owner pahio (2872)
Last modified by pahio (2872)
Numerical id 7
Author pahio (2872)
Entry type Definition
Classification msc 51G05
Classification msc 51F20
Synonym complement angles
Synonym complementary
Related topic ExplementaryAngle
Related topic SupplementaryAngles
Related topic GoniometricFormulae
Related topic ConvexAngle
Related topic Explementary