lim _(x -> (1)/(4) pi) (sin x-cos x)/(3 cos 2 x)=... A.

lim _(x -> (1)/(4) pi) (sin x-cos x)/(3 cos 2 x)=... A. (-1)/(3) akar(2) B. (-1)/(6) akar(2) C. (1)/(3) akar(2) D. (1)/(6) akar(2) E. 3 akar(2)