The value of the integral `int (cos^3x+cos^5 x)/(sin^2 x+sin^4 x) dx` is (A) `sin x-6tan^(-1) (sin x)+C` (B) `sin x-2 (sin x)^(-1)+C` (C) `sin x-2 (sin x)^(-1)-6tan^(-1) (sin x)+C` (D) `sin x-2 (sin x)^(-1)+5tan^(-1) (sin x)+C`