Inverse Cotangent Calculator arccot(x)

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Below is an inverse cotangent calculator (or arccot calculator), which calculates an angle from the ratio from the cotangent function. Enter a result and choose to return radians or degrees, then compute the angle.

Inverse Cotangent Calculator

Using the Arccotangent Calculator

To use the tool to find the angle from a known cotangent, enter the ratio and the units you'd like and compute.

  • Cotangent - ratio of the adjacent side to the opposite side
  • Output Degrees or Radians? - choose to return degrees or radians

Once you're happy, click the "Compute Arccot" button.

  • Angle - the input angle if you wanted to get the cotangent you entered

What is the arccotangent or inverse cotangent?

Arccotangent is the inverse of the cotangent, which is the ratio of the adjacent side to the opposite side in a right triangle.

Right triangle to illustrate trigonometry functions
Right Triangle Diagram (CC By-SA 3.0 Wikimedia)

Arccotangent as a formula

Inverse cotangent is usually abbreviated as "arccot" or "acot", as in the following equation:


Where it is the inverse of cotangent, or:


Next, see all the inverse trigonometric functions or trigonometric functions in one tool.

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