Tutoring Precalculus: Bearing Measurement, Unit Vectors, Using the Law of Cosines

We first looked at getting a bearing measurement between three cities.

The law of cosine was used. As more information is found, you can use the Law of Sine and properties of triangles.

Another problem had a unit vector in which the magnitude was 1.

And other problems involved adding vectors which meant sometimes multiplying them by coefficients and then lining them up head to tail.