Apps. and Interpretation for IBDP Maths Ebook 1 | Page 145

(b) For correct x -intercepts A1
For correct maximum and minimum points A1
For correct domain
A1
For sinusoidal curve starting at (0, 4) and correct
period A1 N4
[4]
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Exercise 38
1. Let f ( x) � 3.5sin(180 x)
, for 0�x
� 4.
(a) (i) Write down the amplitude of f .
(ii) Find the period of f .
(b) On the following grid sketch the graph of f .
[3]
[4]
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