If x=a^2cos^3theta and y=b^2sin^3theta ...

If `x=a^2cos^3theta` and `y=b^2sin^3theta` then `(i) x^2/a+y^2/b=1` (ii) `(x/a^2)^(1/3)+(y/b^2)^(1/3)` (iii)`(x^2/a^2)^(2/3)+(y^2/a^2)^(2/3)=1` (iv) `(x/(a^2))^(2/3) +(y/(b^2))^(2/3)=1`

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