HARCSEC is the trigonometric hyperbolic-arcsecant function, which is the inverse of the HSEC function.
SYNTAX:
HARCSEC(Cx or Exp)
where :
Cx is a conditional variable x
Exp is a Expression
NOTES:
IMPORTANT: Most trigonometric functions expect degrees on input and return their results in degrees (when possible) as well. To convert radians to degrees, multiply radians by 180/PI. Functions such as ARCSIN expect their input to range from -1 to 1.