The Excel COSH function returns the hyperbolic cosine of a number. In geometric terms, the function returns the x-component of the point on the unit hyperbola defined by a hyperbolic angle. For example, the hyperbolic sine of 0 is 1, since the point corresponding to the hyperbolic angle of 0 is P=(1,0), where P=(*x*,*y*).

**Syntax**: =COSH(number)

The COSH function syntax has the following arguments:

**Number**(Required): Any real number for which you want to find the hyperbolic cosine.

**Example**: Let’s look at some Excel COSH function examples and explore how to use the COSH function as a worksheet function in Microsoft Excel:

**Syntax**: =COSH(A2)

**Result**:

Based on the Excel spreadsheet above, the following COSH examples would return:

**Syntax**: =COSH(A3)

**Result**: 1

**Syntax**: =COSH(A4)

**Result**: 2.352409615

**Syntax**: =COSH(A5)

**Result**: 1.810655567

**Syntax**: =COSH(A6)

**Result**: 5.556947167

**Syntax**: =COSH(A7)

**Result**: 2457.384522

**Syntax**: =COSH(A8)

**Result**: 12.2866462

**Syntax**: =COSH(A9)

**Result**: 228.5734504