secant ['sikənt]

例句:

• The value of the complement of the secant is called the cosecant.
  正割函数的倒数，称为余割函数。
  
• A secant is defined as line passing through two points of the curve.
  割线的定义是一条通过曲线上两点的直线.
  
• The pulse envelope we obtained is a hy - perbolic secant function of time.
  所得脉冲包络为时间的双曲正割函数.