Example 4.2. Consider if 0

Extracted text: Example 4.2. Consider if 0 < x="">< 5="" 2="" (t="" –="" x)="" if="" 5="">< x="">< t="" 2.x="" (29)="" this="" is="" a="" triangular="" profile="" for="" u(x,0)="f(x)" and="" again="" we="" take="" du/ət(x,0)="g(x)" =="" 0.="" since="" du/dt="0" we="" have="" en="0" and="" dn="" are="" given="" by="" %3d="" ||="" 22="" (t="" –="" x)="" sin="" nxdx="" 7/2="" dn="" x="" sin="" nxdx="">