Проводим "подвижный" луч из центра окружностей и находим его точки пересечения с внутренней и внешней окружностями
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表达式11: "k" equals 5.0 0 1k=5.001
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6.2 86.28
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表达式12: "y" equals tangent left parenthesis, "k" , right parenthesis "x" left brace, 0 less than or equal to "x" less than or equal to "a" times cos "k" , right bracey=tankx0≤x≤a·cosk
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表达式13: "y" equals tangent left parenthesis, "k" , right parenthesis "x" left brace, 0 greater than or equal to "x" greater than or equal to "a" times cos "k" , right bracey=tankx0≥x≥a·cosk
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隐藏 标签 left parenthesis, "a" cos left parenthesis, "k" , right parenthesis , "a" sin left parenthesis, "k" , right parenthesis , right parenthesisacosk,asink
隐藏 标签 left parenthesis, "b" cos left parenthesis, "k" , right parenthesis , "b" sin left parenthesis, "k" , right parenthesis , right parenthesisbcosk,bsink
Через найденные точки пересечения проводим перпендикуляры к осям ОХ и OY.
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Пересечение этих перпендикуляров - точка эллипса
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表达式18: "x" equals "a" cosine left parenthesis, "k" , right parenthesis left brace, "x" squared plus "y" squared less than or equal to "a" squared , right bracex=acoskx2+y2≤a2
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表达式19: "y" equals "b" sine left parenthesis, "k" , right parenthesis left brace, "x" squared plus "y" squared less than or equal to "a" squared , right bracey=bsinkx2+y2≤a2
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隐藏 标签 left parenthesis, "a" cos "k" , "b" sin "k" , right parenthesisacosk,bsink
