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The angle of elevation of the top T of a pole from a point X...

Mathematics
NECO 2001

The angle of elevation of the top T of a pole from a point X on the horizontal ground is 32°, if X is 68 m away from the foot F of the pole, calculate the height FT of the pole, correct to one decimal place.

  • A. 128.3m
  • B. 108.8m
  • C. 80.2m
  • D. 57.7m
  • E. 42.5m
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Correct Answer: Option E
Explanation

to calculate for the high of the pole, we use sohcahtoa

Let the height of the pole be x.

Tan32º = \(\frac{opp}{adj}\)

Tan32º =  \(\frac{x}{68}\)

x = Tan32º x 68 = 42.5m ( to 1 d.p)


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