Apps. and Interpretation for IBDP Maths Ebook 1 | Seite 376

Your Practice Set – Applications and Interpretation for IBDP Mathematics
39.2 (a) 3
(b) 4
(c) x � 0 , x � 360 or x � 720
39.3 (a) 90
(b) { y:1� y�
5}
39.4 (a)
(c) x �� 82.5 , x �� 52.5 ,
(b)
x � 7.5 or x � 37.5
1
2
� 3 1�
�y:
� � y�
�
� 4 4�
(c) x � 180 or x � 900
Chapter 13
Exercise 41
41.1 (a) AB � 8.13 cm
(b) BC � 3.38 cm
41.2 (a) AB � 21.8 cm
(b)
2
228 cm
41.3 (a) BC � 68.7 cm
(b) AB � 55.4 cm
41.4 (a) BAˆ
C�
70.
7
(b) BC � 53.8 cm
Exercise 40
40.1 (a) (i) 5.5 hours
(ii) 1.4 m
(b) (i) 0.7
(ii)
�360
�
� �
� 11 �
(iii) 1.1
(c) 16:15
40.2 (a) (i) 13 hours
(ii) 2.4 m
(b) (i) 1.2
(ii)
�
�
�
(iii) 3
(c) 16:00
40.3 (a) 9:18
(b) (i) 45
(ii) 10
(iii) 46
(c) 10:22
40.4 (a) (i) 35
360
13
�
�
�
(ii)
�180
�
� �
� 13 �
(iii) 38
(b) 18.1 m
(c) 14:00
Exercise 42
42.1 (a) APB ˆ � 101
(b) PB � 86.4 m
(c) PC � 48.3 m
42.2 (a) PRQ ˆ � 45
(b)
QPR ˆ � 21
(c) PQ � 9.87 m
42.3 (a) 78.6
(b) x � 1.58
(c) h � 7.84
42.4 (a) 29
(b) 38.3
(c) 18.6 m
Exercise 43
43.1 (a) 60
(b) BC � 9 cm
(c) 3� cm
43.2 (a) ABC ˆ � 120
(b) 60
(c) 47.8 cm
43.3 (a) AC � 14 cm
(b)
2
119 cm
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