13) lim(3sinx+cos3x)"° — 14) lim (sin2 == 1m{ 5SI1n X¥ + COS SX im (sin zx nas bầu, ap + —= —
ina (2y +7 ) on Ly Coo + oly ant |, = = Lim ad m a =
ar = y0 cot (y +1) — #ưn (2u + TẾ ) 470—tany + Gary,
cot (y+) = (œ%(4 +12) Gt A) =—tany,
alia) As x 0," tan ~
CoS (440 )- wy (61 ©n 2⁄12 ^ 9inw iu, + *~4
_ Go
Le = lm Lie) oe) — bn Ink se aoe
xO Vou x90 LX
Trang 2
i) tem Se x0 x 2) lim(1—x) tan (=) xo 2
2x-2 l—cosxcos2x 3) lim———————— 4) lim————
) we cotx—sin2x ) xo0 x 5) es 6) lim seme —oos2 cos 3x 4_—teS3L A4ax)* =2x+e
x0 X x0 sin’ x 2: 5
+
11) lim(cos axa?) 12) =e (af Let y= ao r clearly y 20 a rot
%2% (LAY at) Ð
= Lig ~ Dam as ~ Ông
% (4-5)( 1+ xt) Jam dna — Unb
4-2x3
,0<x<2 ,2<x
lạ= 4© x~ 5O: €
‘ta EIR\ 40,25: ‡(u) 5 continuous
be-% b=-% ‡(z) =‡U*) = ‡(z)
Trang 3+
e*¬' sin(x| x—2|) x|x-2| trên R
⁄Œ)=