In a triangle XYZXYZXYZ, the length of side XY XY\,XY is 9.4 km and the length of side XZ XZ\,XZ is 13.1 km. The angle at X X\,X is 48∘48^\circ48∘.
Work out the length of YZYZYZ.
Give your answer to 3 significant figures.
Practise Edexcel GCSE Maths The Cosine Rule with exam-style questions for Foundation and Higher tier. 44 questions, matched to the Edexcel GCSE Maths (1MA1) 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.