In trigonometry the arccosine or “inverse cosine” is one of the inverse trigonometric functions.

The arccosine is a section (or right inverse) to the cosine function cos, which in turn is one of the trigonometric functions. More precisely, it is the unique continuous section of the epimorphism in the (epi, mono) factorization of the cosine such that its value at $0$ is $\pi/2$ (see pi).

See also

- Wikipedia,
*Arccos (trigonometry)*

Last revised on May 10, 2019 at 15:07:56. See the history of this page for a list of all contributions to it.