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If (ax)/(cos theta)+(by)/(sin theta)=a^(...

If `(ax)/(cos theta)+(by)/(sin theta)=a^(2)-b^(2), (ax sin theta)/(cos^(2) theta)-(b y cos theta)/(sin^(2) theta)= 0` show that `(ax)^(2//3) +(by)^(2//3) =(a^(2)-b^(2))^(2//3)`

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