A parallelogram ABCD ABCD\,ABCD has area 55 cm2. Given AB AB\,AB has length 5 cm, BC BC\,BC has length 12 cm and angle ABC ABC\,ABC is obtuse.
Find the size of angle ABC ABC\,ABC to 2 decimal places.
Find the length of the diagonal AC AC\,AC to 1 decimal place.
84 exam-style questions on CCEA A Level Maths 1.4 Trigonometry, covering 1.4.1 Trigonometry, 1.4.2 Trigonometry, 1.4.3 Trigonometry, 1.4.4 Trigonometry, 1.4.5 Trigonometry, 1.4.6 Trigonometry, and 1.4 Trigonometry. Each one has a worked solution and a mark scheme showing where the marks go.