Jamb 1987 Mathematics Questions
Question 26:
Find the eleventh term of the progression 4, 8, 16.....
- A 2<sup style='font-size: smaller;'>13</sup>
- B 2<sup style='font-size: smaller;'>12</sup>
- C 2<sup style='font-size: smaller;'>11</sup>
- D 2<sup style='font-size: smaller;'>10</sup>
Question 27:
Three angles of a nonagon are equal and the sum of six other angles is 1110o. Calculate the size of one of the equal angles
- A 210<sup style='font-size: smaller;'>o</sup>
- B 150<sup style='font-size: smaller;'>o</sup>
- C 105<sup style='font-size: smaller;'>o</sup>
- D 50<sup style='font-size: smaller;'>o</sup>
Question 28:
Two chords QR and NP of a circle intersect inside the circle at x. If RQP = 37o, RQN = 49o and QPN = 35o, find PRQ
- A 35<sup style='font-size: smaller;'>o</sup>
- B 37<sup style='font-size: smaller;'>o</sup>
- C 49<sup style='font-size: smaller;'>o</sup>
- D 59<sup style='font-size: smaller;'>o</sup>
Question 29:
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 \(\frac{-1}{2}\), \(\frac{\sqrt{-3}}{2}\), \(\frac{\sqrt{3}}{3}\)
Question 30:
If tan \(\theta\) = \(\frac{m^2 - n^2}{2mn}\) find sec\(\theta\)
- A \(\frac{m^2 + n^2}{(m^2 - n^2)}\)
- B \(\frac{m^2 + n^2}{2mn}\)
- C \(\frac{mn}{2(m^2 + n^2)}\)
- D \(\frac{m^2n^2}{2(m^2 - n^2)}\)