Consider the following function. IV X4 dx (a) Determine an appropriate trigonometric substitution.. O Use x = sin(0), where - Use x = tan(0), where - 2 -SCE It 2 dx = sos < 0 < IT 2 since the integrand contains the expression 1 + x. It since the integrand contains the expression 1 + x. IL Use x = sec (0), where 0 0 < or i 0 < since the integrand contains the expression 1 + x. 2 (b) Apply the substitution to transform the integral into a trigonometric integral. Do not evaluate the integral. x4 | V+R 3t 2 de