Mathematics Waec Past Questions and Answers

Question 16 :

• WAEC 1988

If sinθ = 3/5 find tanθ for 0 < θ < 90^o

A. 4\5
B. 3\4
C. 5\8
D. 1\2
E. 3\8

Question 17 :

• WAEC 1988

Simplify (27^1/3)²

A. 4¹/₂
B. 6
C. 9
D. 18
E. 81

Question 18 :

• WAEC 1988

A student told to draw the graph of y = x² + 4x - 6. He is then told to draw a liner graph on the same axis such that the intersection of the two graphs will give the solutions to the equation x² + 4x - 7 = 0, What is the equation of the linear graph he needs to draw?

A. X = 1
B. X = -1
C. Y = 1
D. Y = -1
E. X + y = 1

Question 19 :

• WAEC 1988

Calculate the value of x in the diagram above

A. 18^o
B. 30^o
C. 40^o
D. 60^o
E. 15°

Question 20 :

• WAEC 1988

Find the quadratic equation whose roots are x = -2 or x = 7

A. X² + 2x - 7 = 0
B. X² - 2x + 7 = 0
C. X² + 5 +14 = 0
D. X² - 5x - 14 = 0
E. X² + 5x - 14 = 0