| 1. |
(i) Opposite side |
(ii) Adjacent side |
(iii) Hypotenuse |
|
a.
|
q
|
r
|
p
|
|
b.
|
b
|
c
|
a
|
|
c.
|
c
|
a
|
b
|
|
d.
|
AC
|
AB
|
BC
|
|
e.
|
PR
|
PQ
|
QR
|
|
f.
|
GE
|
EF
|
FG
|
| 2. Evaluate the following trigonometric ratios and round them to 4 significant figures, where appropriate: |
|
a.
|
sin 54° = 0.8090
|
g.
|
sin 45° = 0.7071
|
|
b.
|
cos 42° = 0.7431
|
h.
|
cos 45° = 0.7071
|
|
c.
|
tan 61° = 1.804
|
i.
|
tan 45° = 1
|
|
d.
|
sin 12° = 0.2079
|
j.
|
sin 60° = 0.8660
|
|
e.
|
cos 78° = 0.2079
|
k.
|
cos 60° = 0.5
|
|
f.
|
tan 89° = 57.29
|
l.
|
sin 30° = 0.5
|
3. a.
|
x
|
0°
|
30°
|
45°
|
60°
|
90°
|
120°
|
135°
|
150°
|
180°
|
| sine x |
0
|
0.5
|
0.7071
|
0.866
|
1
|
0.866
|
0.7071
|
0.5
|
0
|
| cosine x |
1
|
0.866
|
0.7071
|
0.5
|
0
|
-0.5
|
-0.7071
|
-0.866
|
-1
|
b.
|
|
