Mathematics 2012 Waec Past Questions and Answers

Question 16 :

• WAEC 2012

The lengths of the minor and major arcs 54cm and 126cm respectively. Calculate the angle of the major sector

A. 360^o
B. 252^o
C. 246^o
D. 234^o

Question 17 :

• WAEC 2012

In \(\bigtriangleup\) XYZ, /XY/ = 8cm, /YZ/ = 10cm and /XZ/ = 6cm. Which of these relation is true?

A. /XY/ + /YZ/ = /XZ/
B. /XY/ - /YZ/ = /XZ/
C. /XY/² = /Y/² - /XY/²
D. /YZ/² = /XZ/² - /XY/²

Question 18 :

• WAEC 2012

If cos(x + 40)^o = 0.0872, what is the value of x?

A. 85^o
B. 75^o
C. 65^o
D. 45^o

Question 19 :

• WAEC 2012

A kite flies on a taut string of length 50m inclined at tan angle 54^o to the horizontal ground. The height of the kite above the ground is

A. 50 tan 30^o
B. 50 sin 54^o
C. 50 tan 54^o
D. 50 sin 36^o

Question 20 :

• WAEC 2012

Given that the mean of the scores 15, 21, 17, 26, 18 and 29 is 21, calculate the standard deviation of the scores

A. \(\sqrt{10}\)
B. 4
C. 5
D. \(\sqrt{30}\)