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Acot

ACOT Function

The ACOT function in Excel returns the arc cotangent (or inverse cotangent) of a number. The result, in radians, is between 0 and π for positive numbers, or between -π and 0 for negative numbers. Essentially, it's the angle whose cotangent is the specified number.

Syntax:

ACOT(number)
  • number: This is a required argument. It represents the cotangent value for which you want to calculate the inverse cotangent.

Examples:

  1. =ACOT(1) would return an angle in radians, approximately 0.7854 (or 45° when converted to degrees).
  2. =ACOT(0) would return π/2 (approximately 1.5708 radians, or 90°).
  3. =ACOT(-1) would return an angle in radians, approximately -0.7854 (or -45° when converted to degrees).
  4. =ACOT(A1) would return the arc cotangent of the number in cell A1.

Note: If you want the result in degrees instead of radians, you can use the formula =DEGREES(ACOT(number)).