5 (a) The diagram shows the graph of y = acos bx+c, for -360° ≤ x ≤ 360°, where a, b and c are constants. Find the values of a, b and c. [Figure 5.1 - A cosine graph is shown. Max value at x=0 is 2, min value at x=180 is -10. Period is 360 degrees.]

1. (a)The diagram shows the graph of y = acos bx+c, for -360° ≤ x ≤ 360°, where a, b and c are constants. Find the values of a, b and c.[3]
2. (b)The line y = p is a tangent to the curve y = 3 - 2 sin 60. Write down the possible values of p.[2]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.