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Show that the lenght of the portion of t...

Show that the lenght of the portion of the tangent to the curve `x^(2/3)+y^(2/3)=a^(2/3)` at any point of it, intercept between the coordinate axes is contant.

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The correct Answer is:
`sqrt(a^(2)(cos^(2) theta+ sin^(2) theta))= a =` cosnstant
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