Jamb 1980 Mathematics Questions
Question 46:
The angles marked in the figure are measured in degrees. Find x.
- A 45<sup style='font-size: smaller;'>o</sup>
- B 90<sup style='font-size: smaller;'>o</sup>
- C 60<sup style='font-size: smaller;'>o</sup>
- D 15<sup style='font-size: smaller;'>o</sup>
- E 30<sup style='font-size: smaller;'>o</sup>
Question 47:
In the figure, PS = SR and Rx is a tangent to the circle at R, < QRX is equal to 72o. Find
- A 20<sup style='font-size: smaller;'>o</sup>
- B 36<sup style='font-size: smaller;'>o</sup>
- C 72<sup style='font-size: smaller;'>o</sup>
- D 30<sup style='font-size: smaller;'>o</sup>
- E 15<sup style='font-size: smaller;'>o</sup>
Question 48:
If \(\theta\) = \(\frac{3}{2}\) and \(\theta\) is less than 90o, calculate tan \(\frac{(90 - \theta)}{cos^2\theta}\)
- A \(\frac{1}{2}\)
- B \(\frac{4}{\sqrt{3}}\)
- C \(\sqrt{3}\)
- D 4\(\sqrt{3}\)