How do I use the law of cosines calculator?
To use the law of cosines calculator, you need to input the lengths of two sides and the included angle.
What if I only have the lengths of all three sides?
You can still use the law of cosines! Just input the lengths of the three sides, and the calculator will find the angles.
Can you give me an example calculation?
Sure! If you have sides a=5, b=6, and c=7, you can calculate angle A using the formula: A = cos⁻¹((b² + c² - a²) / (2bc)).
What is the result for those values?
For a=5, b=6, and c=7, angle A is approximately 44.42 degrees.
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