When should you use the sine rule and when should you use the cosine rule?

The sine rule can be used when we either know:a) the length of two sides A and B and an angle that is not the corner where A and B meetb) two angles and the length of one side
The cosine rule can be used when we know:a) all three side lengths orb) when we have the length of sides A and B and the angle of the corner where A and B meet

JB

Related Maths GCSE answers

All answers ▸

How is trigonometry used on non-right angled triangles?


How to solve Simultaneous Linear Equations, e.g. (4x + 5y = 17) and (3x + 2y = 4)


For the equation 7x+3y=10x/y make x the subject.


Factorise (x+3)(x-8)