The surface z=x Sin y intersected by the plane y=3&pgr;/2

[Graphics:calc4-12_3gr2.gif][Graphics:calc4-12_3gr10.gif]
[Graphics:calc4-12_3gr2.gif][Graphics:calc4-12_3gr11.gif]

[Graphics:calc4-12_3gr2.gif][Graphics:calc4-12_3gr12.gif]