Below are a range of different resources to help prepare you for the progress test. It is up to you how much you interact with these resources, however the more you practice the better your understanding will be.
VIDEOS
Watch this video which teaches you both the sine and cosine rules. You need these for finding sides and angles in non-right angle triangles.
There is also a formula to find the area of a triangle for a non-right angle triangle. Watch this:
RESOURCES
Cosine rule practice
Read section 9.1 starting on page 174, including the examples. Then attempt Exercise 9A on page 177.
Sine rule practice
Read section 9.2 starting on page 179, including the examples. Then attempt Exercise 9B on page 181.
Area of triangle practice
Read section 9.3 on page 185 including Examples 8 and 9. Then try Exercise 9D starting on page 186.