In triangle ABCABCABC, BC=18BC = 18BC=18 cm, AB=11AB = 11AB=11 cm, and angle ACB=25∘ACB = 25^\circACB=25∘.
Angle BAC BAC\,BAC is obtuse. Work out the size of angle BACBACBAC. Give your answer to 3 significant figures.
Practise AQA GCSE Maths The Sine Rule with exam-style questions for Foundation and Higher tier. 39 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.