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# Sine and cosine law calculator

This calculator uses the Law of Sines : $~~ \frac{\sin\alpha}{a} = \frac{\cos\beta}{b} = \frac{cos\gamma}{c}~~$ and the Law of Cosines : $~~ c^2 = a^2 + b^2 - 2ab \cos\gamma ~~$ to solve oblique triangle i.e. to find missing angles and sides if you know any 3 of the sides or angles. Also, the calculator will show you a step by step explanation.

Sine and Cosine Law Calculator
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 Enter known values: side a = side b = side c = angle α = angle β = angle γ =

 Select value to find: side a side b side c angle α angle β angle γ area A
Show me an explanation
examples
example 1:
A triangle has sides equal to $3 m$, $5 m$ and $6 m$. Find angle $\alpha$.
example 2:
What is the length of side c?
example 3:
Find angle $\beta$.

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