Waec Mathematics Past Questions and Answers

Question 1186:

• WAEC 2008

The angles of a quadrilateral are (x + 10)^o, 2y^o, 90^o and (100 - y)^o, Find y in terms of x

A. Y = 160 + x
B. Y = 100 + x
C. Y = 160 - x
D. Y = x - 100

Question 1187:

• WAEC 2008

If x^o is obtuse, which of the following is true?

A. X . 90
B. 180 < x < 270
C. X < 90
D. 90 < x < 180

Question 1188:

• WAEC 2008

If tan x = 1, evaluate sin x + cos x, leaving your answer in the surd form

A. 2\(\sqrt{2}\)
B. \(\frac{1}{2} \sqrt{2}\)
C. \(\sqrt{2}\)
D. 2

Question 1189:

• WAEC 2008

If cos (x + 25)^o = sin 45^o, find the value of x

A. 20
B. 30
C. 45
D. 60

Question 1190:

• WAEC 2008

If 2ⁿ = 128, find the value of (2^{n - 1})(5^{n - 1})

A. 5(10⁶)
B. 2(10⁶)
C. 5(10⁵)
D. 2(10⁵)