There are two versions of the cosine rule: Find an unknown side using 𝑎² = 𝑏² + 𝑐² – 2𝑏𝑐 cos𝐴 Find an unknown angle using cos𝐴 = \(\frac{𝑏² + 𝑐² – 𝑎²}{2𝑏𝑐}\) Scientific calculators need to ...
In this video we look at an example involving the Law of Cosines. In this triangle we are given the 3 sides of the triangle and asked to find the measure of the smallest angle. In order to solve the ...
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