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In the diagram, TX is perpendicular to UW, |UX| = 1cm and |TX| = |WX|...

Mathematics
WAEC 2016

In the diagram, TX is perpendicular to UW, |UX| = 1cm and |TX| = |WX| = \(\sqrt{3}\)cm. Find UTW
  • A. 135o
  • B. 105o
  • C. 75o
  • D. 60o
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Correct Answer: Option C
Explanation
In \(\Delta\) UXT, tan\(\alpha\) = \(\frac{1}{\sqrt{3}}\)

\(\alpha\) = tan-1(\(\frac{1}{\sqrt{3}}\))

= 30o

In \(\Delta\)WXT, tan\(\beta\) \(\frac{\sqrt{3}}{\sqrt{3}}\) = 1

\(\beta\) = tan-1(1) = 45o

Hence, < UTW = \(\alpha\) + \(\beta\)

= 30o + 45o = 75o

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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