tangentpc - Maple Help

geometry

 tangentpc
 find the tangent of a point on a circle with respect to that circle

 Calling Sequence tangentpc(l, P, c)

Parameters

 l - the name of the tangent line P - point c - circle

Description

 • The routine returns l which is the tangent of point P on circle c with respect to c.
 • For more details on the result, use detail.
 • The command with(geometry,tangentpc) allows the use of the abbreviated form of this command.

Examples

 > $\mathrm{with}\left(\mathrm{geometry}\right):$
 > $\mathrm{point}\left(A,1,0\right),\mathrm{circle}\left(c,{x}^{2}+{y}^{2}=1,\left[x,y\right]\right)$
 ${A}{,}{c}$ (1)
 > $\mathrm{tangentpc}\left(l,A,c\right)$
 ${l}$ (2)
 > $\mathrm{form}\left(l\right)$
 ${\mathrm{line2d}}$ (3)
 > $\mathrm{Equation}\left(l\right)$
 ${-}{1}{+}{x}{=}{0}$ (4)