Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Trigonometry
Law of Cosines Calculator
Finds the third side of a triangle when two sides and the included angle are known, using c = √(a² + b² − 2ab·cos(C)). Essential for solving oblique (non-right) triangles in surveying, navigation, structural engineering, and computer graphics.
Fill in the required fields to see your result.
Trigonometry
Sine Calculator
Calculates the sine of an angle entered in degrees, returning a value between −1 and 1. Use it when solving right triangles, decomposing vector components, modeling waves, or working through trigonometry homework.
Fill in the required fields to see your result.
Key differences
| Law of Cosines Calculator | Sine Calculator | |
|---|---|---|
| Category | Trigonometry | Trigonometry |
| Inputs required | 3 | 1 |
| Result | Side C (units) | Sine value |
| What it does | Finds the third side of a triangle when two sides and the included angle are known, using c = √(a² + b² − 2ab·cos(C)). Essential for solving oblique (non-right) triangles in surveying, navigation, structural engineering, and computer graphics. | Calculates the sine of an angle entered in degrees, returning a value between −1 and 1. Use it when solving right triangles, decomposing vector components, modeling waves, or working through trigonometry homework. |