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What is the evolute of parabola called?

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What is the evolute of parabola called?

(a) Cycloid

(b) Spiral

(c) Congruent parabola

(d) Semicubical parabola

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This interesting question is from Evolutes in division Differential Calculus of Engineering Mathematics

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Correct option is (d) Semicubical parabola

For explanation: The evolute of parabola is called semicubical parabola. It is defined parametrically as

x=t^2  and y=at^3.

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