In this problem we want to find the antiderivative of y=secx. that is, we wish to evaluate ∫secxdx we can accomplish this by multiplying the integrand by the quantity secx+tanxsecx+tanx and then using a basic substitution. part 1. suppose that you want to re-write the integral using a substitution, in this case, ∫secxdx=∫1udu determine the correct substitution that will accomplish this. that is, find u as a function of x that allows you to re-write the integral as show