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597

Q:

If S denotes the area of the curved surface of a right circular cone of height h and semi vertical angle ∝ then S equals

  • 1
    $$πh^2 tan^2∝ $$
  • 2
    $${1\over 3}πh^2tan^2∝$$
  • 3
    $$πh^2sec∝tan∝$$
  • 4
    $${1\over 3}πh^2sec∝tan∝$$
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  • Workspace

Answer : 3. "$$πh^2sec∝tan∝$$"

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