The radian, denoted by the symbol rad, is the unit of angle in the International System of Units (SI) and is the standard unit of angular measure used in many areas of mathematics.The unit was formerly an SI supplementary unit (before that category was abolished in 1995). The radian is defined in the SI as being a dimensionless unit, with 1 rad = 1. Its symbol is accordingly often …

The steradian (symbol: sr) or square radian is the unit of solid angle in the International System of Units (SI). It is used in three-dimensional geometry, and is analogous to the radian, which quantifies planar angles.Whereas an angle in radians, projected onto a circle, gives a length on the circumference, a solid angle in steradians, projected onto a sphere, gives an area on the …

Radian (w skrócie rad od łac. radius „promień”) – jednostka miary łukowej kąta płaskiego zdefiniowana jako miara kąta środkowego, w którym długość łuku wyznaczonego przez kąt środkowy jest równa promieniowi okręgu. Niemianowana jednostka pochodna układu SI

ラジアン毎秒（ラジアンまいびょう、記号: rad/s）は、国際単位系(SI)における角速度・角周波数の単位である。. ラジアン毎秒は、1秒間に1ラジアンの角速度・角周波数と定義される。 ラジアンの定義から、1回転毎秒（1ヘルツ）は 2π ラジアン毎秒となる。. 1ラジアン毎秒 = 180/ π 度毎 …

The Insurance Institute for Highway Safety (IIHS) is a U.S. nonprofit organization funded by auto insurance companies, established in 1959 and headquartered in Arlington, Virginia.It works to reduce the number of motor vehicle traffic collisions, and the rate of injuries and amount of property damage in the crashes that still occur.It carries out research and produces ratings for …

The radian is determined by the circumference of a circle that is equal in length to the radius of the circle (n = 2 π = 6.283...). It is the angle subtended by an arc of a circle that has the same length as the circle's radius. The symbol for radian is rad. One turn is 2 π radians, and one radian is 180° / π, or about 57.

Le radian (symbole : rad) est l'unité d'angle (plan ou dièdre) du Système international. Par définition, un angle ayant son sommet au centre d'un cercle a une mesure d'un radian s'il intercepte, sur la circonférence de ce cercle, un arc d'une longueur égale à …

In physics, angular frequency "ω" (also referred to by the terms angular speed, radial frequency, circular frequency, orbital frequency, radian frequency, and pulsatance) is a scalar measure of rotation rate.It refers to the angular displacement per unit time (for example, in rotation) or the rate of change of the phase of a sinusoidal waveform (for example, in oscillations and waves), or as ...

三角函数（英語： trigonometric functions ）是數學中常見的一類關於角度的函数。 三角函數將直角三角形的内角與它的两個邊的比值相关联，也可以等价地用与单位圆有关的各种线段的长度来定义。 三角函数在研究三角形和圆等几何形状的性质时有重要作用，也是研究振动、波、天体运动以 …

A radial basis function (RBF) is a real-valued function whose value depends only on the distance between the input and some fixed point, either the origin, so that () = ^ (‖ ‖), or some other fixed point , called a center, so that () = ^ (‖ ‖).Any function that satisfies the property () = ^ (‖ ‖) is a radial function.The distance is usually Euclidean distance, although other ...