'- - File: VI_Tan3.txt

R<t> = <t, t^2 ,0>  :  A<t> = <2, 4, 0>    ' When t = 2.
t0 = 2  :  pi = 3.14159

' This worksheet shows one method to find the directional angles with respect to their 
'      respective axis. t0 was choosen to match the value of R.x when t = 2.

Ur<t> = vUnit[R]                             ' R / |R|
a1 = ACos[Ur.x | t0] * 180/pi            ' Ans: 63.435 degrees to x-axis.
b1 = ACos[Ur.y | t0] * 180/pi            ' Ans: 26.565 degrees from y-axis.
c1 = ACos[Ur.z | t0] * 180/pi            ' Ans: 90 degrees from the z-axis.
' Note: Assign some value (t0 here) to the parameters in Ur.x & Ur.y so we can assign
'       constant ID to the outcome.
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