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Show that the equation of a line passing through `(acos^3theta,asin^3theta)` and perpendicualar to the line `xsectheta+ycos e ctheta=a 'i s 'xcostheta-ysintheta-acos2thetadot`

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Equation of the line passing through the point (acos^3theta, a sin^3theta) and perpendicular to the line xsectheta + y cosec theta =a is xcostheta-ysintheta =acos2theta .

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