Evaluate
Thus, the value of the line integral over the curve C is
Step 1 :Given the line integral
Step 2 :Substitute the parameterizations of x and y into the integral to get
Step 3 :Simplify the integral to
Step 4 :Calculate the integral of ds from -1 to 1 to get 4
Step 5 :Thus, the value of the line integral over the curve C is