A triangle with vertices A, B, and C. The side AC is labeled 15 cm. The side BC is labeled 12 cm. The interior angle at vertex C is labeled 20∘20^\circ20∘.
Work out the length of AB.
Give your answer to 1 decimal place.
The Cosine Rule Questions
Practise AQA GCSE Maths The Cosine Rule with exam-style questions for Foundation and Higher tier. 44 questions, matched to the AQA GCSE Maths (8300) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.