Waec Mathematics Past Questions and Answers

Question 1286:

• WAEC 2009

(a) Copy and complete the table of values for \(y = \sin x + 2 \cos x\), correct to one decimal place.

x	0°	30°	60°	90°	120°	150°	180°	210°	240°
y		2.2				-1.2	-2.0		-1.9

(b) Using a scale of 2 cm to 30° on the x- axis and 2 cm to 0.5 units on the y- axis, draw the graph of \(y = \sin x + 2\cos x\) for \(0° \leq x \leq 240°\).
(c) Use your graph to solve the equation : (i) \(\sin x + 2 \cos x = 0\) ; (ii) \(\sin x = 2.1 - 2\cos x\).
(d) From the graph, find y when x = 171°.

Question 1287:

• WAEC 2010

Simplify 0.000215 x 0.000028 and express your answer in standard form

A. 6.03 x 10⁹
B. 6.02 x 10⁹
C. 6.03 x 10^-9
D. 6.02 x 10^-9

Question 1288:

• WAEC 2010

Simplify 0.000215 x 0.000028 and express your answer in standard form

A. 6.03 x 10⁹
B. 6.02 x 10⁹
C. 6.03 x 10^-9
D. 6.02 x 10^-9

Question 1289:

• WAEC 2010

Factorize: x + y - ax = ay

A. (x - y)(1 - a)
B. (x + y)(1 + a)
C. (x + y)(1 - a)
D. (x - y)(1 + a)

Question 1290:

• WAEC 2010

A car uses one litre of petrol for every 14km. If one of petrol cost N63.00, how far can the car go with N900.00 worth of petrol?

A. 420km
B. 405km
C. 210km
D. 200km