Computing Integrals - Elements of Scientific Computing - page 27

Fig. 1.9 The Storebælt bridge in Denmark
Source : Wikimedia Commons, which is a media repository making available public domain
and freely-licensed educational media content to all; Photo by Tone V. V. Rosbach Jensen.

Fig. 1.10 A simplified sketch of a bridge similar to the Storebælt bridge in Denmark

Fig. 1.11 If x is small
enough, the length s can be
approximated by the length of
a straight line

y

s

Dy

Dx

s

x = a xx Dx x = b