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Omni Calculator
omnicalculator.com
Use this law of cosines calculator to determine the third side of a triangle knowing two sides and the angle between ...
Trigonometry2 options compared
Law of Cosines Calculator
Calculates unknown sides and angles within a non-right triangle using the Law of Cosines formula. Users input specific measurements to determine missing values, offering two primary functions. The first function allows users to find the length of the third side when given two known sides and the included angle (SAS). Alternatively, it can calculate the internal angles of a triangle when all three...
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Other OptionsRanked by votes
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02Pi Day Calculatorspiday.orgSolves triangle problems using the law of cosines when two sides and an included angle are known.
Side by side
Law of Cosines Calculator options compared
| Tool | Best for | Strengths | Limitations |
|---|---|---|---|
| Omni Calculator omnicalculator.com | Quick side or angle calculations |
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| Pi Day Calculators piday.org | Diverse angle unit needs |
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Buyer's guide
How to choose a law of cosines calculator
When picking a law of cosines calculator, the key decision is whether you need broad unit support or a streamlined experience. If your work involves surveying, navigation, or any field where angles might be measured in gradians, minutes, or seconds, the Pi Day tool gives you those options without extra conversion steps. If you just want to plug in side lengths and an angle and get a result fast, the Omni Calculator version removes distractions and has been tested by other users.
Questions
Law of Cosines Calculator FAQ
- Can I use the law of cosines for any triangle?
- The law of cosines formula is c² = a² + b² - 2ab × cos(γ), where γ is the angle opposite side c. Rearranging this formula lets you solve for a missing side when two sides and the included angle are known, or for a missing angle when all three sides are known.
- What if I only know one side and one angle?
- If you have one side and one angle, you would need additional information, such as another side or angle, to use the law of cosines or law of sines effectively.
- Do these calculators handle obtuse angles?
- When you input an obtuse angle, the calculator uses the cosine value correctly, and the resulting side length or angle will reflect the triangle's actual shape.
- Why would I choose one calculator over the other?
- The Omni Calculator version is more streamlined for general use, while the Pi Day version provides more granular unit controls for specialized needs.
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