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In the figure, XYZ is a triangle with XY = 5cm, XZ = 2cm and...

Mathematics
JAMB 1997

In the figure, XYZ is a triangle with XY = 5cm, XZ = 2cm and XZ is produced to E making the angle < YZE = 150o. If the angle XYZ = \(\theta\), calculate the value of sin\(\theta\)

  • A. \(\frac{3}{5}\)
  • B. \(\frac{1}{2}\)
  • C. \(\frac{2}{5}\)
  • D. \(\frac{1}{5}\)
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Correct Answer: Option D
Explanation

\(\frac{5}{\sin 30^o} = \frac{2}{\sin \theta} = \frac{5}{\frac{1}{2}} = \frac{2}{\sin \theta}\)

10 = \(\frac{2}{\sin \theta}\)

sin\(\theta\) = \(\frac{2}{10}\)

= \(\frac{1}{5}\)


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