S-4-R-2-prove-

Question Number 60816 by ANTARES VY last updated on 26/May/19

S = 4 π R^{2} prove

Answered by tanmay last updated on 26/May/19

d s = R d θ \times R s i n θ d ϕ

S = R^{2} \int_{0}^{π} s i n θ d θ \int_{0}^{2 π} d ϕ

= R^{2} \times 2 \times 2 π = 4 π R^{2}

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