https://www.extramarks.com/question-answers/show-that-semi-vertical-angle-of-right-circular-cone-of-given-surface-area-and?question_ids=1696709&lang=1
Show that semi-vertical angle of right circular cone of given surface area and maximum volume is...
show-that-semi-vertical-angle-of-right-circular-cone-of-given-surface-area-and
right circular conevertical anglesurface areashowsemi