.. _docs-meteoinfolab-numeric-funcitons-acos: ******************* acos ******************* .. currentmodule:: mipylib.numeric.minum .. function:: acos(x) Trigonometric inverse cosine, element-wise. :param x: (*array_like*) *x*-coordinate on the unit circle. For real arguments, the domain is ``[-1, 1]``. :returns: (*array_like*) The inverse cosine of each element of *x*, in radians and in the closed interval ``[0, pi]``. Examples:: >>> acos([1, -1]) array([0.0, 3.1415927])