Returns the angle (in radians) whose cosine is specified.
acos(cosine)
is the cosine of the angle, expressed as a column name, variable, or constant of type float, real, double precision, or any datatype that can be implicitly converted to one of these types.
Returns the angle whose cosine is 0.52:
select acos(0.52)
-------------------- 1.023945
acos, a mathematical function, returns the angle (in radians) whose cosine is the specified value.
ANSI SQL – Compliance level: Transact-SQL extension.
Any user can execute acos.
“Mathematical functions” for general information about mathematical functions.
