Learn how to solve for the lengths of the sides and the measures of the angles of a triangle using the law of cosines. The ...

Learn how to determine the angle between two vectors. To determine the angle between two vectors you will need to know how to ...

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 ...