acos
(acos z)
Returns the arccosine of z, in radians. (acos 1) is the exact 0. There are no complex numbers: an argument outside [-1, 1] is refused with an error naming acos.
(acos z)
Returns the arccosine of z, in radians. (acos 1) is the exact 0. There are no complex numbers: an argument outside [-1, 1] is refused with an error naming acos.