Purpose
The COSH function returns the hyperbolic cosine of a number. The return value is in the range [1, +∞).
Syntax
COSH(number)
Parameters
number is a number data type (NUMBER, FLOAT, BINARY_FLOAT, or BINARY_DOUBLE) or a value that can be implicitly converted to a number data type.
Return type
If the number parameter is of the BINARY_FLOAT type, the return type is BINARY_DOUBLE. Otherwise, the return type is the same as the number parameter.
Examples
Return the hyperbolic cosine of 0.
obclient> SELECT COSH(0) FROM DUAL;
+---------+
| COSH(0) |
+---------+
| 1 |
+---------+
1 row in set