(a)1cos(a−b)[log|sin(x−a)|+log|sec(x−b)|]+c(b)1cos(a−b)[log|sin(x−a)|−log|sec(x−b)|]+c(c)1cos(a+b)[log|sin(x−a)|+log|sec(x−b)|]+c(d)1sin(a−b)[log|sin(x−a)|+log|sec(x−b)|]+c