Cambridge International Mathematics

318 Trigonometry (Chapter 15)

EXERCISE 15B.1

1 For each of the following triangles find:

i sinμ ii cosμ iii tanμ iv sinÁ v cosÁ vi tanÁ

abc

de f

2 Construct a trigonometric equation connecting the angle with the sides given:

abc

de f

gh i

3

abc

z

y

q x

f

4

7

q

f

q

p

r q

f

q f

3 4

5

q f

3 5 q

f

7

4

Unless otherwise stated, all

lengths should be given

correct to significant

figures and all angles correct

to decimal place.

3

1

70°

x

a

35°

x

b

73°

x

f

64°

x

c

40°

x

d

49°

x

e

x 54°

g

30°

x h

68°

x

i

30°

xcm

15 cm

64°

xm

4.8 m

76°

xcm

16 cm

Find, correct to 2 decimal places, the value ofxin:

IGCSE01

cyan magenta yellow black

(^05255075950525507595)
100 100
(^05255075950525507595)
100 100
Y:\HAESE\IGCSE01\IG01_15\318IGCSE01_15.CDR Tuesday, 7 October 2008 2:04:23 PM PETER