Cambridge Additional Mathematics

Answers 481

h

i

j

k

l

2aa=4, b=3,c=¡ 1 ba=3, b=5,c=3

3ay= 2 cos 2x by= cos

¡x

2

¢

+2

4aa=5,

b=1,

c=1

b

5aa=^32 , b=6,c=¡^32

b

cy=¡^32 cos 6x+^32

EXERCISE 9D

1a

b

c

d

e

1

¼ 2 ¼x

y y=¡¡¡cos3x+1

O

2

2

¼ 2 ¼x

y

y=4_¡¡¡cosx+10

O

4

6

8

10

12

14

¼ 2 ¼ x

y y = 2_¡¡¡cos3x + 4

O

2

4

6

¼ 2 ¼x

y

y = 4_¡¡¡cos2x - 2

O

-2

-4

-6

2

¼ 2 ¼x

y

y = 3_¡¡¡cos2x + 5

O

2

4

6

8

1

x

y

O

3

2

y=-¡¡¡Ewcos6x+Ew

yp_ e_p _pw Wd_p

¼ 2 ¼x

y

y=5_¡¡¡cosx+1

O

2

4

-2

-4

6

y

O x

y = 2_¡¡¡tanx

• -¼¼ --wppw wpw__p ¼¼

y

• -¼¼--Th_hTp_p --pwpw__ --ppyy O p_yy_p wpwp hTh_T_pp ¼¼ x

y=y=¡¡¡¡¡¡tantan3x3x

y

O x

2 y=¡¡¡tantanx+2

• -¼¼ --wppw wpw__p ¼¼

y

O x

y = 3_y = 3_¡¡¡¡¡¡tantan2x2x

• -¼¼ --fEEf_p_p --pwpw --_prr_p p_pr_r wpw__p fEfEpp ¼¼

y

O x

y=2_¡¡¡tantanx-1

-1

• -¼¼ --pw_p_w wpw__p ¼¼

cyan magenta yellow black

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