Jamb Mathematics 1995 Past Questions and Answers

Question 76:

• JAMB 1995

The derivative of cosec x is

A. Tan x cosec x
B. -cot x cosec x
C. Tan x sec x
D. -cot x sec x

Question 77:

• JAMB 1995

For what value of x is the tangent to the curve y = x\(^2\) - 4x + 3 parallel to the x-axis?

A. 3
B. 2
C. 1
D. 6

Question 78:

• JAMB 1995

Two variables x and y are such that \(\frac{dy}{dx}\) = 4x - 3 and y = 5 when x = 2. Find y in terms of x

A. 2x² - 3x + 5
B. 2x² - 3x + 3
C. 2x² - 3x
D. 4

Question 79:

• JAMB 1995

Find the area bounded by the curve y = 3x\(^2\) - 2x + 1, the ordinates x = 1 and x = 3 and the x-axis.

A. 24
B. 22
C. 21
D. 20

Question 80:

• JAMB 1995

\(\begin{array}{c|c} \text{Age in years} & 13 & 14 & 15 & 16 & 17 \\ \hline \text{No. of students} & 3 & 10 & 30 & 42 & 15\end{array}\)
The frequency distribution above shows the ages of students in a secondary school. In a pie chart constructed to represent the data, the angles corresponding to the 15 years old is

A. 27^o
B. 30^o
C. 54^o
D. 108^o