Hi all, I am having troublesimplifying or factoringthe following trigonometric limits. I can't find the identities for the last two.

1. lim (1-tan(x))/(sin(x)-cos(x)) as x approaches pie/4

2. lim (sin(3t))/(2t) as t approaches 0

3. lim (sin(2x))/(sin(3x)) as x approaches 0

Any help would be appreciated!