Returns the hyperbolic cosine of a number.

**Sample Usage**

COSH(1)

COSH(C5)

**Syntax**

COSH(number)

- number - The number for which the hyperbolic cosine is to be computed.

**Examples**

COSH(1) returns the hyperbolic cosine of 1 i.e. 1.54308

COSH(C5) returns the hyperbolic cosine of the number contained in C5.