Barton, Edwin H. (Edwin Henry), b. 1858 · London, Macmillan and Co., limited · leaf 288
0 wehave instead x = a/3 and x=2a/3. For C+D=0 weobtain the two diagonals of the square y = x and y = a — x.Lastly, for C= D the equation of the nodal curve is a 9 cos2 — + cos2 — = 77 (29). This is a closed curve resembling a circle. Its diametersparallel to the sides of the square are aj 2, while…
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