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A right circular cone has a base radius r cm and a vertical angle 2yo....

Mathematics
JAMB 1984
A right circular cone has a base radius r cm and a vertical angle 2yo. The height of the cone is
  • A. r tan yo cm
  • B. r sin yo cm
  • C. r cot yo cm
  • D. r cos yo cm
  • E. r cosec yo cm
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Correct Answer: Option C
Explanation
\(\frac{r}{h}\) = tan yo

h = \(\frac{r}{tan y^o}\)

= r cot yo
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