Tan Calculator

The tangent function (tan) is the ratio of the opposite side to the adjacent side, equivalent to sin(θ)/cos(θ). Tangent represents the slope of the line from the origin to a point on the unit circle.

1. 1tan(θ) = opposite / adjacent = sin(θ) / cos(θ)
2. 2Undefined at 90° and 270° (where cos = 0)
3. 3tan(45°) = 1 (slope of a 45° line)
4. 4Period of tangent is 180° (π radians)