Functions defined in terms of a right-angled triangle (see diagram) and widely used in the solution of many mathematical problems. They are defined as:
tangent of angle A, written tanA = a/b
sine of angle A, written sinA = a/c
cosine of angle A, written cosA = b/c,
where a is the length of the side opposite the angle A, b is the length of the side opposite the angle B, and c is the hypotenuse of the triangle. The reciprocal functions are:
cotangent of angle A, written cotA = 1/tanA = b/a
secant of angle A, written secA = 1/cosA = c/b
cosecant of angle A, written cosecA = 1/sinA = c/a
Trigonometric functions
- meso form
- meson
- meson-catalysed fusion
- mesoscopic
- metal fatigue
- metallography
- metallurgy
- metamict state
- metastable state
- meteor
- meteorite
- method of mixtures
- metre
- metre bridge
- metric system
- metric ton
- metrology
- MHD
- mho
- Michelson-Morley experiment
- micro-
- microbalance
- microcomputer
- microelectronics
- microgravity