import NUM from "./NUM"

/**
 * Returns the inverse hyperbolic cosine of a number.
 * 
 * View Documentation - https://learn.fulcrumapp.com/dev/expressions/reference/acosh/
 * @param value (Number, required): value to calculate the inverse hyperbolic cosine. Must be greater than or equal to 1.
 * @example
 * ACOSH(7) // returns 2.6339157938496336
 */

export default function ACOSH(value: number): number
export default function ACOSH(value: string): number
export default function ACOSH(value: any) {
  const parsedNumber = NUM(value)
  return Math.log(parsedNumber + Math.sqrt(parsedNumber * parsedNumber - 1))
}