How to Find the Cotangent on a Graphing Calculator


In trigonometry, the cotangent is the reciprocal of the tangent. The formula for determining the tangent is the opposite side divided by the adjacent side of a triangle. So, since the cotangent is the reciprocal, then the formula for determining the cotangent is the adjacent side divided by the opposite side of the triangle. When inputting cotangent into a graphing calculator, you need to know the angle in degrees for which you are trying to find the cotangent.

Things You'll Need

  • Graphing calculator
  • Type "1" into your graphing calculator.

  • Press the division sign. The calculator is now prepared to perform a reciprocal calculation.

  • Press the button marked "TAN."

  • Type the angle for which you are calculating the cotangent.

  • Press "ENTER" to solve for the cotangent.


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