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.
Practise Edexcel A Level Maths Trigonometric Ratios with exam-style questions for A Level Maths. 20 questions covering 9.1 The Cosine Rule, 9.2 The Sine Rule, 9.3 Areas of Triangles, 9.4 Solving Triangle Problems, 9.5 Graphs of Sine, Cosine and Tangent, and 9.6 Transforming Trigonometric Graphs, matched to the Edexcel A Level Maths (9MA0) 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.
