Waec Mathematics 1989 Past Questions and Answers

Question 46:

• WAEC 1989

sinθ = ¹/₂ and cosθ = -√3/2, what is the value of θ?

A. 30 ⁰
B. 60 ⁰
C. 90 ^o
D. 120 ^o
E. 150 ^o

Question 47:

• WAEC 1989

What is the probability that 3 customers waiting in a bank will be served in the sequence of their arrival at the bank

A. 1/6
B. 1/3
C. 1/2
D. 2/3
E. 5/6

Question 48:

• WAEC 1989

In the diagram, O is the center of the circle, If ∠POQ = 80^o and ∠PRQ = 5x, find the value of x.

A. 4^o
B. 8^o
C. 16^o
D. 20^o
E. 32^o

Question 49:

• WAEC 1989

In an A.P the first term is 2, and the sum of the 1st and the 6th term is 161/2. What is the 4th term

A. 12
B. 9¹/₂
C. 8
D. 7
E. 5¹/₂

Question 50:

• WAEC 1989

(a) Without using Mathematical tables, find x, given that \(6 \log (x + 4) = \log 64\)
(b) If \(U = {1, 2, 3,4, 5, 6, 7, 8, 9, 10}, X = {1, 2, 4, 6, 7, 8, 9}, Y = {1, 2, 3, 4, 7, 9}\) and \(Z = {2, 3, 4, 7, 9}\). What is \(X \cap Y \cap Z' \)?