The Sine Rule
- Use either the right, or left hand equation.
- You are given 3 quantities and required to work out the 4 th.
Manipulating the ratio - Take two ratios, cross multiply and rearrange to put the required quantity as the subject of the equation.
Example #1
Example #2
Example #3
The Cosine Rule
There are two problem types:
- You are given 2 sides + an included angle and required to work out the remaining side
- You are given all the sides and required to work out the angle.
Example #1
Example #2
