Waec Mathematics Past Questions For Year 2021

Question 36

\(\overline{XY}\) is a line segments with the coordinates X (- 8,- 12) and Y(p,q). if the midpoint of \(\overline{XY}\) is (-4,-2) find the coordinates of Y.

waec 2021

  • A. (-6,-2)
  • B. (0,8)
  • C. (4,10)
  • D. (0,4)
View Answer and Explanation

Question 37

Height(cm) 160 161 162 163 164 165
No. of players 4 6 3 7 8 9
the table shows the height of 37 players of a basketball team calculates correct to one decimal place the mean height of the players.

waec 2021

  • A. 163.0
  • B. 162.0
  • C. 160.0
  • D. 165.0
View Answer and Explanation

Question 38

In the diagram, line \(\overline{EC}\) is a diameter of the circle ABCDE.

If angle ABC equals 158°, find ∠ADE

waec 2021

  • A. 112
  • B. 90
  • C. 68
  • D. 22
View Answer and Explanation

Question 39

Given that sin x = 3/5, 0 ≤ x ≤ 90, evaluate (tanx + 2cosx)

waec 2021

  • A. 2\(\frac{11}{20}\)
  • B. \(\frac{11}{20}\)
  • C. 2\(\frac{7}{20}\)
  • D. \(\frac{1}{20}\)
View Answer and Explanation

Question 40

A cone has a base radius of 8cm and height 11cm. calculate , correct to 2d.p, the curved surface area

waec 2021

  • A. 341.98cm\(^2\)
  • B. 276.57cm\(^2\)
  • C. 201.14cm\(^2\)
  • D. 477.71cm\(^2\)
View Answer and Explanation