卡帕线kapaxian
由原点向半径为a而圆心在X轴上变动的圆所引切线的切点轨迹（如图）.
卡帕线的方程是(x2+y2)y2＝a2x2；极坐标方程是p=actgθ.直线y=±a是卡帕线的渐近线.
卡帕线是4次代数曲线.
- voice
- voice
- Voice ofAmerica
- voiceprint
- Vojvodina
- volcanoes
- Volcano Islands
- Volcker，Paul
- vole
- Volga—Baltic Waterway
- Volga，River
- Volgograd
- volleyball
- Volsted Act
- Volsungasaga
- volt
- voltage
- voltage divider
- voltaic cells
- Voltaire
- Volta Redonda
- Volta，Alessandro，Count
- Volta，River
- voltmeter
- voluntary muscle