Waec Mathematics Questions
Question 626:
Simplify \(\frac{4}{x+1}-\frac{3}{x-1}\)
- A \(\frac{x+7}{x^2 - 1}\)
- B \(\frac{x-7}{x^2 + 1}\)
- C \(\frac{x-7}{x^2 - 1}\)
- D \(\frac{x-11}{x^2 - 1}\)
Question 627:
If y varies inversely as x\(^2\), how does x vary with y?
- A X varies inversely as y2
- B X varies inversely as y
- C X varies directly as y2
- D X varies directly as y
Question 628:
If \(tan x = \frac{1}{\sqrt{3}}\), find cos x - sin x such that \(0^o \leq x \leq 90^o\)
- A \(\frac{\sqrt{3}+1}{2}\)
- B \(\frac{2}{\sqrt{3}+1}\)
- C \(\frac{\sqrt{3}-1}{2}\)
- D \(\frac{2}{\sqrt{3}-1}\)
Question 629:
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
Question 630:
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 \(\frac{x}{2 cos 40^o}\)