Graphs can approach limiting slope {asymptote, graph}|, as independent variable approaches infinity or negative infinity.
Circles {unit circle} can have center at origin of Cartesian coordinates and radius one unit.
angle
Unit-circle points define angle between radius and positive x-axis.
Counterclockwise angle is positive. 90 degrees equals pi/2 radians. 180 degrees equals pi radians. 270 degrees equals 3 * pi/2 radians.
Clockwise angle is negative. -90 degrees equals -pi/2 radians. -180 degrees equals -pi radians. -270 degrees equals -3 * pi/2 radians.
coordinates
Unit-circle point (x,y) relates to angle A by trigonometric functions: x = cos(A) and y = sin(A). Coordinates x and y relate: x^2 + y^2 = 1, because radius = 1.
Outline of Knowledge Database Home Page
Description of Outline of Knowledge Database
Date Modified: 2022.0225