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Sine The sine function [Home] [Search] [Forum] [Links] [Contact] [Imprint] [Sitemap]
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The sine function in the unit circle
In the unit circle, the angle alpha is assigned to the y-coordinate of the point of intersection S on the circle as sine. This means that in the unit circle the cosine of alpha is equal to the sine of alpha.
Cognitions that are recognised on the base of a unit circle sin (90° + x) = sin (90° - x) sin (180° + x) = - sin (180° - x) sin a = - sin (360° - a) sin a = sin (360° + a)
Sine function in the coordinate system
The sine curve is an odd function, that is symetrical to the point 0 (0;0) and repeats itself after 3600 (periodically).
Special values that are in the sine funtion in the unit circle and in the coordinate system
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