Waec Mathematics Past Questions and Answers

Question 196:

• WAEC 1991

The first term a of an A.P is equal to twice the
common difference d. Find, in terms of d, the 5th
term of the A.P.

A. 4d
B. 5d
C. 6d
D. A + 5d
E. 2a + 4d

Question 197:

• WAEC 1991

The common ratio of a G.P. is 2. If the 5th term is
greater than the 1st term by 45, find the 5th term,

A. 3
B. 6
C. 45
D. 48
E. 90

Question 198:

• WAEC 1991

Two towns, P and Q, are on (4^oN 40^oW) and (4^oN
20^oE) respectively. What is the distance between
them, along their line of latitude? (Give your
answer in teems of π and R, the radius of the earth).

A. 2πR cos4^o
B. πR sin40^o
C. πR/2 cos4^o
D. πR/3 cos4^o
E. πR/6 cos4^o

Question 199:

• WAEC 1991

the graph above is a sketch of

A. Y = sin 2x
B. Y=sinx
C. Y=cos2x
D. Y=2sinx
E. Y = 2cos x

Question 200:

• WAEC 1991

Given that sin \(\theta\) = -0.9063, where O \(\leq\) \(\theta\) \(\leq\) 270°, find \(\theta\).

A. 65^o
B. 115^o
C. 145^o
D. 245^o
E. 265^o