Answer to Question #145439 in Differential Geometry | Topology for Dolly

Question #145439
Find the centre of curvature of the curve
x=3t y=t^2-6 at (x,y)
1
Expert's answer
2020-11-25T17:51:24-0500

Here 9(y+6)=x2.9(y+6)=x^2. Hence y=x296.y=\frac{x^2}{9}-6. Hence y1=2x9,y2=29.y_1=\frac{2x}{9}, y_2=\frac{2}{9}.

Hence center of curvature is (xy1[1+y12]y2,y+1+y12y2)x-\frac{y_1[1+y_1^2]}{y_2}, y+\frac{1+y_1^2}{y_2}) . Hence required coordinate is

(x2x/92/9(1+4x281)x-\frac{2x/9}{2/9}(1+\frac{4x^2}{81}), y+1+4x2812/9y+\frac{1+\frac{4x^2}{81}}{2/9} )= (4x3/81,y+9/2+2x29)-4x^3/81, y+9/2+\frac{2x^2}{9})=(4x3/81,3y+16.5-4x^3/81, 3y+16.5 ) .


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