1. lim sec x - 1 / xsecx (x--->0)
2. lim (1-cosx)^2 / x (x--->0)
3. lim 5x / sin 4x (x--->0)
Sometimes I get these, and sometimes I don't. Is there any specific way I'm supposed to look at these trig. functions? I keep getting marked off for the way I've been solving them. =/
Any help is greatly appreciated!