SL 3.2—Triangle trigonometry Topic Practice
SL 3.2—Triangle trigonometry Topic Practice
Practise using sine rule, cosine rule and triangle area formulae to find sides, angles and algebraic expressions from labelled triangles.
How this is tested
- apply the cosine rule to find a missing side such as BC from two sides and an included angle
- use the sine or cosine rule to calculate an angle, choosing the valid triangle angle from the diagram
- form algebraic triangle results, such as AB^2 in terms of x, before using area = 1/2ab sin C