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[" If "x=a(cos t+t sin t),y=a(sin t-t co...

[" If "x=a(cos t+t sin t),y=a(sin t-t cos t)," then "((dx)/(dt))^(2)+((dy)/(dt))^(2)=],[[" a) "-t^(2)," b) "t^(2)," c) "-a^(2)t^(2)]]

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