1993 - WAEC Mathematics Past Questions and Answers - page 4
31
Cos 75o has the same value as
A
cos 115o
B
cos 255o
C
cos 285o
D
-sin165o
32
If sin x = 12/13, where 0° < x < 90°, find the value of 1 - cos\(^2\)x
A
25/169
B
64/169
C
105/169
D
144/169
33
The angle of elevation of the top of a tower from a point on the horizontal ground, 40m away from the foot of the tower is 30o. Find the height of the tower.
A
20m
B
40√3m /3
C
20√3m
D
40√3m
34
At a point 500m from the base of a water tank the angle of elevation of the top of the tank is 45o. Find the height of the tank,
A
250m
B
353m
C
354m
D
433m
35
Find the median of the following set of numbers: 28, 29, 39, 38, 33, 37, 26, 20, 15, 25
A
33
B
29.5
C
29
D
28.5
36
What is A∩B in the diagram above?
A
(2,3)
B
(2,3,4)
C
(1,2,3)
D
(2,3,8)
37
The table above shows the scores of a group of 40 students in a physics test.
If the mode is m and the median is n, then (m,n) is
A
(5,5)
B
(5,6)
C
(6,5)
D
(9,4)
38
The table above shows the scores of a group of 40 students in a physics test
What is the mean of the distribution?
A
4.2
B
4.5
C
4.8
D
5.0
39
Find the median of the set of numbers 12, 15, 13, 14, 12, 12.
A
12
B
12.5
C
13
D
13.5
40
The distribution by state of 840 students in the Faculty of Science of a Nigerian University in a certain session is as follows:
| Bendel | 45 |
| kwara | 410 |
| Ogun | 105 |
| Ondo | 126 |
| Oyo | 154 |
Â
In a pie chart drawn to represent this distribution, the angle subtended by Ondo is
Â
A
36o
B
42o
C
45o
D
48o
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