If p^2=a^2(cosθ)^2+b^2(sinθ)^2,prove p+d^2p/dθ^2= a^2b^2/p^3

 


If p^2=a^2(cosθ)^2+b^2(sinθ)^2,prove p+d^2p/dθ^2= a^2b^2/p^3




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