Verify expression (14), Sec. 39, for the derivative of Z(τ) = z[φ(τ)].
Z'(τ ) = z '[φ(τ)]φ'(τ )
enables us to write expression (13) as

Thus the same length of C would be obtained if representation (10) were to be used.
If equation (2) represents a differentiable arc and if z'(t) ‰  0 anywhere in the interval a

Transcribed Image Text:

z'(t) T- 20)