 Phần chung  sin9 3 cos9 1x x− =  2 7 2 , , 18 9 54 9 k k x x k π π π π = + = + ∈¢  !  "#$%%&%%'%()* +,-./#$0. 1+, "#$2! ,/ 3456 ##$ 78-9 -#: #;  <$+,(=>?! #/@ 1:,(=?/@A B5 @ # 15 ( ) 216 P H = C#$0. n -D 2 2 2 3 3 3 2 100 n n n n n n n n C C C C C C − − + + = # 4n = &-BEAF -G9H?I% -,JKL?M  NIM7  O 3LP?M7  NIMC  OCQ! RS3R0+TJKLJ KLP #US3R0+TJKLJKLP( • <3R0VW%73X#$3R02O • <3R0V%73X#$3R02OW Phần riêng7 Theo chương trình cơ bản 5, cos3 4cos2 3cos 4 0x x x− + − = # , 2 x k k π = + π ∈ ¢ ,L-Y Z  - [ \L]% - [ , [ I\L](, Z Y Z ,3, Z \(, Z , [ I( [ - ^ _% `8- [  ^ (, Z /. a  / a , , [  , ^ 3, Z L , Y Z ,-. a  / a , Z b a ]3 [ b ^ b a \_` + Y Z . [ c. ^  / a ,Y Z  - [ \L] b [ + a b ^ b a \_` Theo chương trình nâng cao 5+de n (#$/I.c%f 3 3−n a (A#$ g, 3 3−n x -2,, h  g, ( ) ( ) 2 1 2+ + n n x x  n  3 3 26 − = n a n # 5n = +L- 1\L] 1!I(,\]iiL%\]jLf_%`%k (=(*(/ g,\%L]%\ , Lhl_k`iiL + -,! \]3mknii\] ( ) F SD∈ Lhln(,- g, BE_`k3e]1#/I,TcA g, 12 ;+o _`k(6  Phần chung   2 2 4sin 5sin cos 6cos 0x x x x− − =  3 arctan2 , arctan ; 4 x k x k k   = + π = − + π ∈  ÷   ¢ L1+,-./#$.p5 "#$q92! ,/ "#$=/. 2! %-1 1B "#$2q 1B "#$6 #775#$ 7_9:0Cr/ =/4%5r/ =/?,Lfs/.Cr/ =/>?!  #/@-Cr/1 1 r//43/?,  # 194 ( ) 210 P A = CA#$ g, 8 x -2,,h  g, ( ) 8 2 1 1x x   + −   #tA#$ g, 8 x ( 3 4 8 8 3 238C C+ = &-BE3eAF -G93/q1 H?I% -Sr/,I<H1  r/,I 4 π r/,Sr/,I , 4 O Q π    ÷    g,JKL?M  NI  OC #LP 2 2 2 2 4 2 2 x y     − + − =  ÷  ÷     Phần riêng7 Theo chương trình cơ bản 5, ( ) ( ) 2cos 1 2sin cos sin2 sinx x x x x− + = − # 2 , , 3 4 x k x k k π π = ± + π = − + π ∈ ¢ ,L-Y Z  - [ \L] - [ , [ I\L](, Z Y Z +Y Z , Z - ^ H(, Z ,-. a ,  Z  8 [ -%_%`%U%8- [  ^ (, Z /. a  , [ -, ^ b a \%L%L] , Y Z ,-. a  / a , Z b a H3 [ _`U + Y Z . [ c. ^  / a ,Y Z  - [ 2 b [ + a _`U Theo chương trình nâng cao 5+A#$ g, 7 x -2,,h  ( ) 2n 2 3− x %-1/I.c -D 1 3 5 2n 1 2n 1 2n 1 2n 1 2n 1 C C C . C 1024 + + + + + + + + + = # 2 10n = %A#$ g, 7 x ( 7 7 3 10 3 2 2099520− = −C +L- 1\L] 1!I(9h! (pfH(,- g,, J S-\L3]%_(/ g,\Q! RTcA g, 12 ;+oBEr/,_%#-#-3eH3L 7 Phần chung  sin 2 sin5 cosx x x= −  , , 16 2 8 3 k k x x k π π π π = + = + ∈¢  !  "#$%%7%C%&%5%%'%u 1()* +,-./#$0.%v#$p 5 "#$2! ,/3w !  "#$ F %b%+l' #CC#$ 7_q ^ q ^  ^ &3.+?,%C3.+- a 3, Z 73.+3, Z L- ^ <x/., 3.+Y [ ?, [ #/< [ . a  - ^  ^ ,3.+ / Z , Z /  # 19 ( ) 66 P H = C n (#$/I.c-D+@ 3 2 2 9 n n n A C n − + ≤ # 3, 4n n= = &-BE3eAF -G93/q1 H?I% -,Vy%J Ec 17?MINuO3JKL?  NI  N?M5IN5OtDI ?! RJEcP3JKLP8-h0( g,c%L r/,S$?hr/,<V #cP7?MIMO%LP?M7  NIM  OC Phần riêng7 Theo chương trình cơ bản 5, 2 2 cos 3 .cos2 cos 0x x x− = # , 2 k x k π = ∈ ¢ ,L- 1\L] 1!I(9h! (pf_3`(=(*(f < g,,! \3\]yk(/ g,L , Lhl_`ii] + Q! RTcA 1\L] ;+o_`k Theo chương trình nâng cao 5+f 1 2 11 , , .,a a a ( ! A#$-2,#,/ ( ) ( ) 10 11 10 9 1 2 11 1 2 .+ + = + + + +x x x a x a x a tDI>A#$ 5 a  # 5 4 5 10 10 2 672= + =a C C +L- [ c. ^ \L].\](< [ I/. a _%. , ^ L(< [ Iq ^ . a ` +< [ 2Y Z 2, [ 3, Z L- ^ U(, Z b ^ b a r/, Z b a _`3, Z #-#-3 [ L] , Q, [  ^ . 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