We want to determine the isogonal trajectories of this family, i.e. the curves intersecting all members of the family under a given angle, which is denoted by . For this purpose, we denote the slope angle of any curve at such an intersection point by and the slope angle of at the same point by . Then
where means the slope of . Thus the equation
Note. In the special case , it’s a question of orthogonal trajectories.
|Date of creation||2013-03-22 18:59:20|
|Last modified on||2013-03-22 18:59:20|
|Last modified by||pahio (2872)|