Returns the hyperbolic cosine of the argument, where the argument is an angle expressed in radians.

The schema is SYSIBM.

expression

An expression that returns a value of any built-in numeric data type except for DECFLOAT.
The value is converted to a double-precision floating-point number for processing by the function.

The result of the function is a double-precision floating-point number.
The result can be null if the argument can be null or the database is configured with dft_sqlmathwarn set to YES;
the result is the null value if the argument is null.