Cosine Calculator
Compute cos(x) for any angle.
Result
cos(60°)
0.50000000
- Angle (rad)1.047198
- sin0.866025
- tan1.732051
- sin² + cos²1.000000
Step-by-step
- 60° × π/180 = 1.047198 rad.
- cos(1.047198) = 0.50000000.
How to use this calculator
- Enter angle and unit.
- Read cosine plus matching sin/tan.
About this calculator
cos(x) is the x-coordinate of the unit-circle point at angle x. Range [−1, 1], period 2π. Key values: cos(0°) = 1, cos(60°) = ½, cos(90°) = 0, cos(180°) = −1.
Frequently asked
cos(x) = sin(90° − x). Pythagorean identity: sin² + cos² = 1.
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