GEOMETRY AND TRIGONOMETRY - Jamb Mathematics Past Questions and Answers

Question 166:

• JAMB 1981

If sine x equals cosine x, what is x in radians?

A. \(\frac{\pi}{2}\)
B. \(\frac{\pi}{3}\)
C. \(\frac{\pi}{4}\)
D. \(\frac{\pi}{6}\)
E. \(\frac{\pi}{12}\)

Question 167:

• JAMB 1981

A cuboid has a diagonal of length 9cm and a square base of side 4cm. What is its height?

A. 9cm
B. \(\sqrt{65}\)cm
C. \(4\sqrt{2}\)cm
D. 7cm
E. 6.5cm

Question 168:

• JAMB 1981

What is the area between two concentric circles of diameters 26cm and 20cm?

A. 100\(\pi\)
B. 169\(\pi\)
C. 69\(\pi\)
D. 9\(\pi\)
E. 269\(\pi\)

Question 169:

• JAMB 1981

If \(\sin x° = \frac{a}{b}\), what is \(\sin (90 - x)°\)?

A. \(\frac{\sqrt{b^2 - a^2}}{b}\)
B. 1\(\frac{-a}{b}\)
C. \(\frac{b^2 - a^2}{b}\)
D. \(\frac{a^2 - b^2}{b}\)
E. \(\sqrt{b^2 - a^3}\)

Question 170:

• JAMB 1981

An isosceles triangle of sides 13cm, 13cm, 10cm is inscribed in a circle. What is the radius of the circle?

A. 7cm
B. 12cm
C. 8cm
D. 7cm
E. 69cm