Let fequals=left angle x comma y right anglex, y and c be the triangle with vertices (0,plus or minus±33) and (11,0) oriented counterclockwise. evaluate contour integral subscript upper c superscript baseline bold upper f times d bold r∮ cf•dr by parameterizing c. use a parametric description of c and set up the integral. contour integral subscript upper c superscript baseline bold upper f times d bold r∮ cf•drequals=integral from 0 to 1 left parenthesis nothing right parenthesis dt