[" 23.If "x=a(theta-sin theta)" and "y=a...

[" 23.If "x=a(theta-sin theta)" and "y=a(1+cos2t(1-cos2t)" ,show that at "t=(pi)/(4),(dy)/(dx)=b],[" 24.If "x=a sin2t(1+cos2t)" and "y=b cos2t" ? "]

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