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Both calculators run independently — change the inputs on either side to compare results.
Trigonometry
Law of Cosines Calculator
Calculate the unknown side of any triangle when two sides and the included angle are known, using the Law of Cosines. Essential for navigation, land surveying, and geometry problems.
Fill in the required fields to see your result.
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.
Key differences
| Law of Cosines Calculator | Triangle Area Calculator | |
|---|---|---|
| Category | Trigonometry | Trigonometry |
| Inputs required | 4 | 3 |
| Result | Side C Length (units) | Triangle Area (square units) |
| What it does | Calculate the unknown side of any triangle when two sides and the included angle are known, using the Law of Cosines. Essential for navigation, land surveying, and geometry problems. | 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. |