The constant k k\,k satisfies 0<k<900 < k < 900<k<90.
Sketch the graph of y=cos(x+k)y = \cos(x + k)y=cos(x+k) for 0≤x≤3600 \leq x \leq 3600≤x≤360
Sketch the graph, labelling the coordinates of the points where the graph crosses the xxx-axis and the turning points in terms of kkk.
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.