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 OCR GCSE Maths The Cosine Rule with exam-style questions for Foundation and Higher tier. 44 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers 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.