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In the figure, if XZ is 10cm, calculate RY in cm

Mathematics
JAMB 1992

In the figure, if XZ is 10cm, calculate RY in cm

  • A. 10
  • B. 10(1 - \(\frac{1}{\sqrt{3}}\))
  • C. 10(1 - \(\frac{1}{\sqrt{2}}\))
  • D. 10(1 - \(\sqrt{3}\))
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Correct Answer: Option B
Explanation

RY = YZ - RZ

= 10 tan 45 - 10 tan 30

= 10(1 - \(\frac{1}{\sqrt{3}}\))

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