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Saturday, 15 August 2026
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Mathematics Past Questions and Answers

Topic: graphs of sine and cosine

Jamb Mathematics Questions - graphs of sine and cosine

Question 1:
A man's initial salary is N540.00 a month and increases after each period of six months by N36.00 a month. Find his salary in the eight month of the third year.
  • A N828.00
  • B N756.00
  • C N720.00
  • D N684.00
View Answer & Explanation
Question 2:
Find the minimum value of y = x2 - 2x - 3
  • A 4
  • B 1
  • C -1
  • D -4
View Answer & Explanation
Question 3:
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 \(\frac{\pi}{12}\)
View Answer & Explanation
Question 4:
The sine, cosine and tangent of 210o are respectively
  • A \(\frac{1}{2}\), \(\frac{\sqrt{3}}{2}\), \(\frac{\sqrt{3}}{2}\)
  • B \(\frac{1}{2}\), \(\frac{\sqrt{3}}{2}\), \(\frac{\sqrt{3}}{3}\)
  • C \(\frac{1}{2}\), \(\frac{\sqrt{3}}{2}\), \(\frac{\sqrt{3}}{2}\)
  • D \(\frac{-1}{2}\), \(\frac{\sqrt{-3}}{2}\), \(\frac{\sqrt{3}}{3}\)
View Answer & Explanation
Question 5:
A man's initial salary is N540.00 a month and increases after each period of six months by N36.00 a month. Find his salary in the eighth month of the third year
  • A N828.00
  • B N756.00
  • C N720.00
  • D N684.00
View Answer & Explanation