cosine

kosini puhekieltä In a right triangle, the ratio of the length of the side adjacent to an acute angle to the length of the hypotenuse. Symbol: cos
(context) The x coordinate of the point on the unit circle at the given anticlockwise angle from the x axis.
(context) The sum of the real or complex power series
(monikko) cosina|lang=it
(female) cousin