prove rhat the semi vertical angle of the right circular cone of given volume and least curved surface area is cot^-1 (√2). (Answer in a Paper a paper please )
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V=Volume of cone =
C=Curved surface area of cone = , where r is radius and l is slant height of cone. For Maxima and Minima, derivative of C that is curved surface area should be equal to zero. Let A be the semi vertical angle of the cone.
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