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Date November Example question Marks available 3 Reference code EXN.1.AHL.TZ0.8
Level Additional Higher Level Paper Paper 1 Time zone Time zone 0
Command term Write down Question number 8 Adapted from N/A

Question

Let fx=acosbx-c, a,b,c+.

Part of the graph of y=fx is shown below. Point A is a local maximum and has coordinates 1,3 and point B is a local minimum with coordinates 2,-3.

Write down a sequence of transformations that will transform the graph of y=cosx onto the graph of y=fx.

Markscheme

Vertical stretch, scale factor 3        A1

Horizontal stretch, scale factor 1π0.318        A1

Horizontal translation of 1 unit to the right        A1

 

Note: The vertical stretch can be at any position in the order of transformations. If the order of the final two transformations are reversed the horizontal translation is π units to the right.

 

[3 marks]

Examiners report

[N/A]

Syllabus sections

Topic 2—Functions » AHL 2.8—Transformations of graphs, composite transformations
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