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[" If "(ax)/(cos theta)+(by)/(sin theta)...

[" If "(ax)/(cos theta)+(by)/(sin theta)=a^(2)-b^(2)," and "(ax sin theta)/(cos^(2)theta)-(by cos theta)/(sin^(2)theta)=0," prove that "],[(ax)^((2)/(3))+(by)^((2)/(3))=(a^(2)-b^(2))^((2)/(3))]

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