In triangle ABCABCABC, side AB AB\,AB has length 8cm, side BC BC\,BC has length 7cm and side AC AC\,AC has length 6cm.
Verify that the size of angle ABC ABC\,ABC is 46.6∘46.6^\circ46.6∘, to 3 significant figures.
Verify that the area of triangle ABC ABC\,ABC is 20.3 cm2^22, to 3 significant figures.
217 exam-style questions on Edexcel A Level Maths Trigonometric Ratios, 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. Each one has a worked solution and a mark scheme showing where the marks go.