平面向量的係數積(1)
Author: 藍邦偉  老師
Date: 13 1 月 2013

$A$

$B$

向量的係數積

$r=%v$

$ \overrightarrow{a} $

A = (9.685906374970628, 0.4278305015428999)
K_1: (x(Corner[1]), 0)
B = (8.50613175081963, 0.9279523530851707)
K_2: (x(Corner[2]), 0)
a = Vector(A, B)
r = -4 (slider from -4 to 4, step 1)
B': A + (r * (x(B) - x(A)), r * (y(B) - y(A)))
b = Vector(A, B')
text2: r + "\overrightarrow{a}"
c = Circle(A, B)