Mathematics WAEC Past Questions

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556

From the top of a cliff 20m high, a boat can be sighted at sea 75m from the foot of the cliff. Calculate the angle of depression of the boat from the top of the cliff

A. 14.9 ^o
B. 15.5 ^o
C. 74.5 ^o
D. 75.1 ^o

View Answer & Discuss (8) WAEC 1999

557

From the diagram above. ABC is a triangle inscribed in a circle center O. ∠ACB = 40º and |AB| = x cm. Calculate the radius of the circle.

A. \(\frac{x}{sin 40^o}\)
B. \(\frac{x}{cos 40^o}\)
C. \(\frac{x}{2 sin 40^o}\)
D. \(\frac{x}{2 cos 40^o}\)

View Answer & Discuss (2) WAEC 1999

558

The diagram shows the position of three ships A, B and C at sea. B is due north of C such that |AB| = |BC| and the bearing of B from A = 040°. What is the bearing of A from C

A. 040^o
B. 070^o
C. 110^o
D. 290^o

View Answer & Discuss (5) WAEC 1999

559

A pole of length L leans against a vertical wall so that it makes an angle of 60^o with the horizontal ground. If the top of the pole is 8m above the ground, calculate L.