Angles of elevation - Jamb Mathematics Past Questions and Answers

Question 1:

• JAMB 1979

The mean of the numbers 1.2, 1.0, 0.9, 1.4, 0.8, 0.8, 1.2 and 1.1 is

A. 1.5
B. 0.8
C. 1.0
D. 1.02
E. 1.05

Question 2:

• JAMB 2019

The angle of elevation of the top of a tree from a point on the ground 60m away from the foot of the tree is 78°. Find the height of the tree correct to the nearest whole number.

A. 148m
B. 382m
C. 282m
D. 248m

Question 3:

• JAMB 2017

The locus of a point which is equidistant from the line PQ forms a

A. Circle centre P
B. Pair of parallel lines each opposite to PQ
C. Circle centre Q
D. Perpendicular line to PQ

Question 4:

• JAMB 2013

In triangle PQR, q = 8 cm, r = 6 cm and cos P = \(\frac{1}{12}\). Calculate the value of p.

A. \(\sqrt{108}\) cm
B. 9 cm
C. \(\sqrt{92}\) cm
D. 10 cm

Question 5:

• JAMB 1978

The angle of elevation of the top of a vertical tower from a point A on the ground is 60^o. From a point B, 2 units of distance further away from the foot of the tower, the angle of elevation of the tower is 45^o. Find the distance of A from the foot of the tower

A. 3 + \(\sqrt{3}\)
B. 5 + \(\sqrt{3}\)
C. 3 - \(\sqrt{3}\)
D. 1
E. \(\sqrt{3}\) - 1