For x >= 1, what is the value of the integral ∫xsec^(-1)xdx?
A) (x^2)/(2)sec^(-1)x-∫(1)/(2x√(x^2-1))dx
B) (x^2)/(2)sec^(-1)x+∫(x)/(2√(x^2-1))dx
C) (x^2)/(2)sec^(-1)x-∫(x)/(2√(x^2-1))dx
D) None of the above