' - - File: V_VecTest.txt
' - - Application using vector components to find the angles of a line segment.
R<t> = <t, t^2, 0>  :  A<t> = <t, t^2, t^3>
Ur<t> = vUnit[R]     :  Ua<t> = vUnit[A]

pi = 3.14159  :  t0 = 2

rx = ACos[Ur.x | t0] * 180/pi           ' 63.435 degrees - - x-axis.
ry = ACos[Ur.y | t0] * 180/pi           ' 26.565 degrees - - y-axis.
rz = ACos[Ur.z | t0] * 180/pi           ' 90.000 degrees - - (from) the z-axis

ax = ACos[Ua.x | t0] * 180/pi         ' 77.396 degrees - - x-axis.
ay = ACos[Ua.y | t0] * 180/pi         ' 64.123 degrees - - y-axis.
az = ACos[Ua.z | t0] * 180/pi         ' 29.206 degrees - - (from) the z-axis.

' - - Constants only (no parameters) need not have a <... > statement.

