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<=> | y2 = b2 * | ( | 1 - | x2 -- a2 |
) | => | y = sqrt | [ | b2 * | ( | 1 - |
x2 -- a2 |
) | ] |
y = - sqrt | [ | b2 * | ( | 1 - |
x2 -- a2 |
) | ] | + y0 |
equation I: y1 = z * sqrt (a2 - x12) + y0 equ. II: y2 = z * sqrt (a2 - x22) + y0 |