Author: Oscar Cronquist Article last updated on May 04, 2022

The COTH function calculates the hyperbolic cotangent of a hyperbolic angle. The function has been available since Excel 2013.

Formula in cell C3:


Excel Function Syntax



number Required. A numerical value.


The COTH function returns

  • #VALUE! error value if number is a nonnumeric value.
  • #NUM! error value if number is outside the valid range which is 2^27.

The COTH(number) function returns the same value as

  • 1/TANH(number)
  • COSH(number)/SINH(number)
  • (e^number + e^-number)/(e^number - e^-number)