Specification References: G2.2h G2.2h Use the trigonometrical ratios and the sine and cosine rules to solve 2D and 3D problems. |
In three dimensions candidates should identify a right angled triangle that contains the required information and then use trigonometry (or Pythagoras' theorem) to solve the problem. Although the sine and cosine rule can sometimes be used to solve 3D problems they will always be solvable by a combination of right angled triangles.