- #1
swampwiz
- 571
- 83
I was reading the Wikipedia article about this, and I've noticed something that doesn't seem to make sense:
https://en.wikipedia.org/wiki/Frenet–Serret_formulas
The article says that the unit vector for the tangent direction is:
T = ( dr / ds ) / | dr / ds |
OK, that's the standard way to express a unit vector, but it seems that in this case, | dr / ds | is 1, so what is the point of including this term?
https://en.wikipedia.org/wiki/Frenet–Serret_formulas
The article says that the unit vector for the tangent direction is:
T = ( dr / ds ) / | dr / ds |
OK, that's the standard way to express a unit vector, but it seems that in this case, | dr / ds | is 1, so what is the point of including this term?