The cosine rule can find a side from 2 sides and the included angle, or an angle from 3 sides. Using bearings in trigonometry Bearings are angles used in navigation. They are based on moving ...

The adjacent side (\(a\)) is next to the angle in question (\(x\)). The trigonometric ratios for the angles 30°, 45° and 60° can be calculated using two special triangles. An equilateral ...