In triangle ABCABCABC, AC=8AC = 8AC=8 cm and BC=11BC = 11BC=11 cm.
The area of triangle ABC ABC\,ABC is 30 cm2^22, and angle ACB ACB\,ACB is obtuse.
Find the length ABABAB, giving your answer to 3 significant figures.
97 exam-style questions on WJEC A Level Maths 1.5 Trigonometry, covering 1.5.1 Trigonometry, 1.5.2 Trigonometry, 1.5.3 Trigonometry, 1.5.4 Trigonometry, and 1.5.5 Trigonometry. Each one has a worked solution and a mark scheme showing where the marks go.