In triangle ABCABCABC, AB=12 cmAB = 12 \text{ cm}AB=12 cm and angle B=45∘B = 45^\circB=45∘
Given that the area of the triangle is 502 cm250\sqrt{2} \text{ cm}^2502 cm2, find BCBCBC, correct to 1 decimal place.
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.