Mathematics

Problem

\int \frac{dx}{4\cos^3 2x - 3\cos 2x} =

(a)

\frac{1}{3}\log[\sec 6x + \tan 6x] + c

(b)

\frac{1}{6}\log[\sec 6x + \tan 6x] + c

(c)

\log[\sec 6x + \tan 6x] + c

(d) None of these (a)

\frac{1}{3}\log[\sec 6x + \tan 6x] + c

(b)

\frac{1}{6}\log[\sec 6x + \tan 6x] + c

(c)

\log[\sec 6x + \tan 6x] + c

(d) None of these