Given AD=10 cmAD = 10 \text{ cm}AD=10 cm, BD=CD=8 cmBD = CD = 8 \text{ cm}BD=CD=8 cm and angle DAC=30∘DAC = 30^\circDAC=30∘
Find the size of angle ABD ABD\,ABD to one decimal place.
Hence find the size of angle ADCADCADC.
Find the length of ACACAC
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.