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 ...

The angle between VC and the plane is \(y\). It is not possible to use trigonometry to calculate the angle \(y\) because the length of another side is required. Pythagoras' theorem can be used to ...