Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Trigonometry
Triangle Area Calculator
Calculates the area of any triangle from two sides and the included angle (the SAS formula): A = ½·a·b·sin(C). Perfect for surveying, navigation, and engineering tasks where the perpendicular height isn't directly available but two sides and the angle between them are known.
Fill in the required fields to see your result.
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.
Key differences
| Triangle Area Calculator | Law of Cosines Calculator | |
|---|---|---|
| Category | Trigonometry | Trigonometry |
| Inputs required | 3 | 3 |
| Result | Triangle Area (square units) | Side C (units) |
| What it does | Calculates the area of any triangle from two sides and the included angle (the SAS formula): A = ½·a·b·sin(C). Perfect for surveying, navigation, and engineering tasks where the perpendicular height isn't directly available but two sides and the angle between them are known. | 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. |