Jamb Mathematics 1988 Past Questions and Answers

Question 36:

• JAMB 1988

Simplify \(\frac{4a^2 - 49b^2}{2a^2 - 5ab - 7b^2}\)

A. \(\frac{a - b}{2a + b}\)
B. \(\frac{2a + 7b}{a - b}\)
C. \(\frac{2a - 7b}{a + b}\)
D. \(\frac{2a - 7b}{a - b}\)

Question 37:

• JAMB 1988

If cot \(\theta\) = \(\frac{x}{y}\), find cosec\(\theta\)

A. \(\frac{1}{y}\)(x² + y²)
B. \(\frac{x}{y}\)
C. \(\frac{1}{y}\)\(\sqrt{x^2 + y^2}\)
D. \(\frac{x - y}{y}\)

Question 38:

• JAMB 1988

In triangle PQR, PQ = 1cm, QR = 2cm and PQR = 120^o Find the longest side of the triangle

A. \(\sqrt{3}\)cm
B. \(\sqrt{7}\)cm
C. 3cm
D. 7cm

Question 39:

• JAMB 1988

If \(\cos^2 \theta + \frac{1}{8} = \sin^2 \theta\), find \(\tan \theta\).

A. 3
B. \(\frac{3\sqrt{7}}{7}\)
C. 3\(\sqrt{7}\)
D. \(\sqrt{7}\)

Question 40:

• JAMB 1988

If a metal pipe 10cm long has an external diameter of 12cm and a thickness of 1cm find the volume of the metal used in making the pipe

A. 120\(\pi\)cm³
B. 110\(\pi\)cm³
C. 60\(\pi\)cm³
D. 50\(\pi\)cm³