| Group: | Mathematical Functions |
| Topic: | Trigonometric Functions |
| See also: | acosh asin asinh atan atan2 atanh cos cosh sin sinh tan tanh |
| Function: | acos | |
| Description: | Returns the arccosine of the elements of an array. |
| Usage: | z = acos (x) | |
| Input: | ||
| x | array | |
| Output: | ||
| z | array | |
x = #(0, 1/sqrt(2))~#(-1, cos(4))~#(1.1,-1.1) acos(x)
Content of acos [1,] 1.5708 3.1416 +NAN [2,] 0.7854 2.2832 +NAN