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[" EXAMPLE 6"quad f(ax)/(cos theta)+(by)...

[" EXAMPLE 6"quad f(ax)/(cos theta)+(by)/(sin theta)=a^(2)-b^(2)*and(ex sin theta)/(cos^(2)theta)-(by cos theta)/(sin^(2)theta)=],[(ax)^(2/3)+(by)^(2/3)=(a^(2)-b^(2))^(2/3)]

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