u=783801&isprv=&drc=08qi=157064&cfql=08dnb=0&fromQB=0&inProgress=0 Final Exam A surface is defined by z = (x2 + 1) cos(y) + xy. By setting one variable constant, we generate a plane that intersects the surface. Which of the following planes will intersect the surface in a cosine curve? y =1 y = 0 O D = 0