“The radian is a unit which connects the radius of an arc, the length of the arc and the angle subtended by the arc.”

“The radian measure makes many trigonometric equations simpler and so it is the preferred unit of measuring angles in mathematics.”

“Calculates the corresponding angle in degrees from an angle in radian measure.”

“The sliding displacement between doublets may be found by multiplying the shear angle, in radians, by the interdoublet distance.”

“Notice that the formula involves the use of the exponential function, and that the angles must be in radians.”

“Given that the field oscillates at 60Hz, this gives me a phase angle of 0.4PI radians between samples.”