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Law of Cosines

Equation

c^2 = a^2 + b^2 - 2 a b cos(γ) | | 
c | third side length
a | first side length
b | second side length
γ | angle opposite third side

Input values

first side length | 7
second side length | 6
angle opposite third side | 75.5° (degrees)

Result

third side length | 7.998
angle opposite first side | 1.011 radians
= 57.92° (degrees)
= 57 degrees 55 arcminutes 24.88 arcseconds
angle opposite second side | 812.9 mrad (milliradians)
= 46.58° (degrees)
= 46 degrees 34 arcminutes 35.12 arcseconds

Diagram

Diagram

Back to List | POWERED BY THE WOLFRAM LANGUAGE