Apps. and Interpretation for IBDP Maths Ebook 1 | Page 147

(b) On the following grid sketch the graph of f .
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4. Let
�1
�
f ( x) � 3cos � x�, for 0 360
� 2 � �x
� .
(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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