Trigonometry The Sine Rule

1
Trigonometry The Sine Rule
23-Oct-09
For any triangle, use the sine rule to find an
unknown side
any triangle Triangles not containing a right
angle. Here is an example
600
400
10 cm
? cm
2
c
The Sine Rule
A
B


b
C
a

600

400
10 cm
? cm
3

600

400
10 cm
? cm

This means ? 1 is equal to 8.66 0.643

? 13.47 cm
4
3.
10
1.
2.
600
w
20
720
950
12.24
15
1200
v
u
320
320
18.8
13.66
500
6.
8
5.
4.
17.05
16.63
x
650
y
14
z
750
300
12.26
16
800
560