Your best submission for each question part is used for your score. 1. [-/8.33 Points] DETAILS SCALC9 7.3.001. MY NOTES ASK YOUR TEACHER Consider the following function. x 4 dx 1 + x2 (a) Determine an appropriate trigonometric substitution. O Use x = sin(0), where - _ S 0 S _, since the integrand contains the expression 2 2 O Use x = tan(0), where - _