Cotangent Calculator
Calculate the cotangent of an angle in degrees, radians or gradians. Shows "Undefined" when the cotangent does not exist.
What is Cotangent?
Cotangent is the reciprocal of tangent: cot(θ) = cos(θ) / sin(θ) = 1 / tan(θ). It is the ratio of the adjacent to the opposite side in a right triangle.
Notable values: cot(30°) ≈ 1.7321, cot(45°) = 1, cot(60°) ≈ 0.5774. Cotangent is undefined at 0°, 180° and integer multiples of 180°.
Unit conversions: 1° = π/180 rad ≈ 0.01745 rad. 1 rad = 180°/π ≈ 57.296°. 400 gradians = 360°.
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