Trig Calculator
Type an angle. You get sin, cos, tan and their reciprocals, in degrees or radians.
Example — sin(30°)sin(30°) = 0.5
Right triangle solver
How we got it — the example, step by step
- 30° is one of the standard angles, with exact values worth knowing: sin = 1/2, cos = √3/2, tan = 1/√3.
- In decimals: sin = 0.5, cos ≈ 0.866, tan ≈ 0.5774.
Check it backwards
sin² + cos² should be 1: 0.25 + 0.75 = 1. It is — that identity holds for every angle.
Questions people also ask
Degrees or radians?
Both — pick the unit next to the angle. 30° and π/6 radians are the same angle and give the same answers.