IBHM 673 720.PDF

Answers
14 a 3 minutes

b H(t)
39

21

3
0

14 c i 2 mins 15 secs

t

ii 45 secs

Chapter 1
1 a 30°

b 75°

6 a 15.1cm
8 a

1
2

b

15 a 7500

b 7060

c 12 years, 4500 fish

Review Exercise
2p
13p
b
3 7.01cm2 4 14.0m 5 20.6cm2
3
12
c 48.9° d 8.63 mm 7 2.35 6 BC 6 5

2 a

˛

b 44.8°
1
22

c

1
23

d

1
2

e

˛

1

f

22

9 a

23
2

g 23 h

1
22

b y

i

1

j 2

23

k

2
23

c y

4

5

11
2

0

0

360 x
5

4

2

7

9 d

y

e y

2

5

2

0



1

5

b y

10 a y 3 cos 2u 1
11 d u

5
5
cos1x 202°
2
2

p p 7p 2p 13p 7p 19p 5p
, ,
,
,
,
,
,
12 6 12 3 12 6 12 3

12 d x° 60°, 240°

16 a 14.5cm

17 a

4
4
4, 35
, 1 5
12
5

676

c u

12 a x° 135°, 315°

p 5p
,
4 4
b x° 90°

c 20.7°, 80.7°, 140.7°, 200.7°, 260.7°, 320.7°

c x = 1.57

y
4, 3
5

4, 3
5
4x

5p 7p
,
6 6

b 0.169s
b

16, 0
5

b u

c x° 210°, 330°

f x° 10°, 50°, 130°, 170°, 250°, 290°

b x° 109.3°, 160.7°, 289.3°, 340.7°

15 20.9°, 69.1°

p 5p
,
6 6

5p 11p 17p 23p
,
,
,
12 12 12 12

e x° 15°, 165°, 195°, 345°

13 a x° 64.6°, 295.4°
p p
14 , 0
3 3

e u

11 a u

16
5
4

4x

0

4, 3
5
12
5 , 1

4
5

d 64.6°, 295.4°