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At any point t on the curve x=a(t+sint),...

At any point t on the curve x=a(t+sint), y=a(1-cost), find the lengths of tangent, normal, subtangent and subnormal.

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The correct Answer is:
`2a"sin"(t)/(2); 2a "sin" (t)/(2) "tan"^(t)/(2); a sint; 2 a"sin"^(2)(t)/(2) "tan"(t)/(2)`
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