CSCH function
    CSCH(Number) CSCH(Number)
  
  Number
        Number or { Number }
      
      The input number.
Returns
        Number or { Number }
      
      The hyperbolic cosecant.
Returns the hyperbolic cosecant of a number.
Example
      CSCH(1.5)CSCH(1,5)
      
    
    Returns roughly 0.4696.