JAMB - Mathematics (1984 - No. 31)
A right circular cone has a base radius r cm and a vertical angle 2yo. The height of the cone is
r tan yo cm
r sin yo cm
r cot yo cm
r cos yo cm
r cosec yo cm
คำอธิบาย
\(\frac{r}{h}\) = tan yo
h = \(\frac{r}{tan y^o}\)
= r cot yo
h = \(\frac{r}{tan y^o}\)
= r cot yo