Waec Mathematics 1998 Past Questions and Answers

Question 36:

• WAEC 1998

Find the value of X if \(cos x = \frac{5}{8}\) for \(0^o\le X\le 180^o\)

A. 141.3^o
B. 128.7^o
C. 51.3^o
D. 48.7^o
E. 38.7^o

Question 37:

• WAEC 1998

A ladder 5cm long long rest against a wall such that its foot makes an angle 30^o with the horizontal. How far is the foot of the ladder from the wall?

A. \(\frac{5\sqrt{2}}{3}m\)
B. \(2\frac{1}{2}m\)
C. \(\frac{5\sqrt{3}}{2}m\)
D. \(\frac{10\sqrt{3}}{3}m\)
E. \(10\sqrt{3}m\)

Question 38:

• WAEC 1998

A chord of circle of radius 26cm is 10cm from the center of the circle. calculate the length of the chord

A. 16cm
B. 27.86cm
C. 32cm
D. 48cm
E. 55.72cm

Question 39:

• WAEC 1998

Two chords PQ and RS of a circle intersected at right angles at a point inside the circle. If ∠QPR = 35^o,find ∠PQS

A. 35^o
B. 45^o
C. 55^o
D. 70^o
E. 90^o

Question 40:

• WAEC 1998

In the diagram, O is the center of the circle and the reflex angle ROS is 264^o. Find ∠RTS

A. 48^o
B. 53^o
C. 66^o
D. 132^o
E. 192^o