Question

Question about parametric equations, details in reply:
Related to:
http://ocw.mit.edu/courses/mathematics/18-01sc-single-variable-calculus-fall-2010/part-c-parametric-equations-and-polar-coordinates/session-80-parametric-curves/MIT18_01SCF10_Ses80c.pdf

Answer 1

In this pdf, I do not understand a detail of the attached pic.
Specifically, how \[\Delta s / \Delta t\]
is transformed to ds/dx and not ds/dt.

Could anyone explain this?

Answer 2

Or could it just be a typo?

Answer 3

its a typo!

Answer 4

must be ds/dt

Answer 5

for sure

Answer 6

I also think it's just a typo..

Answer 7

great, thanks. Had to make sure of this cause it was bending my mind :0

Answer 8

welcome ^_^