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Date May 2019 Marks available 2 Reference code 19M.2.AHL.TZ2.H_4
Level Additional Higher Level Paper Paper 2 Time zone Time zone 2
Command term Sketch Question number H_4 Adapted from N/A

Question

Sketch the graphs  y = si n 3 x + ln x and  y = 1 + cos x  on the following axes for 0 < x ≤ 9.

[2]
a.

Hence solve  si n 3 x + ln x cos x 1 < 0 in the range 0 < x ≤ 9.

[4]
b.

Markscheme

* This question is from an exam for a previous syllabus, and may contain minor differences in marking or structure.

       A1A1

Note: Award A1 for each correct curve, showing all local max & mins.

Note: Award A0A0 for the curves drawn in degrees.

[2 marks]

a.

x  = 1.35, 4.35, 6.64       (M1)

Note: Award M1 for attempt to find points of intersections between two curves.

0 < x < 1.35      A1

Note: Accept x  < 1.35.

4.35 < x < 6.64       A1A1

Note: Award A1 for correct endpoints, A1 for correct inequalities.

Note: Award M1FTA1FTA0FTA0FT for 0 <  x  < 7.31.

Note: Accept x  < 7.31.

[4 marks]

b.

Examiners report

[N/A]
a.
[N/A]
b.

Syllabus sections

Topic 2—Functions » SL 2.2—Functions, notation domain, range and inverse as reflection
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Topic 2—Functions » SL 2.4—Key features of graphs, intersections using technology
Topic 2—Functions

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