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[23.16x=a(0-sin theta)" and,"y=a(1+cos t...

[23.16x=a(0-sin theta)" and,"y=a(1+cos theta),ln0.(pi)/(4)x^(2)*(dy)/(dx)=(b)/(a)],[" 24.If "x=a sin2t(1+cos2t)" and "y=b cos2t(1-cos2t)," show that at "t=(pi)/(4),(1)/(21)]

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