Arccosine vs. Cosine

Arccosinenoun

(trigonometry) Any of several single-valued or multivalued functions that are inverses of the cosine function.

Cosinenoun

(trigonometry) 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

Cosinenoun

The sine of the complement of an arc or angle. See Illust. of Functions.

Cosinenoun

ratio of the adjacent side to the hypotenuse of a right-angled triangle

Cosinenoun

the trigonometric function that is equal to the ratio of the side adjacent to an acute angle (in a right-angled triangle) to the hypotenuse.