!"# $%&'()*+,
2 3 3 1
y x
= + ! " # $
1
x
!"# $%&'()*+,
' ! " # $ (
2
3
x x
x x
−
' ! " # $ (sin 2x+cos 2x+3sinx−cosx− =2 0
!"# $-&'()*+,
$ # )! *# " & &+,- ./012345/ 1637 ! " # $ " # $
$ #9 ## " & &+,-= >&!! " #.5?@ 5 ? @ " /0101034 5/ 101034@ /01 1 3
!"# $%&'()*+,
0 ( 2 1) cos
π
# - >" " *# ( 2P n +6A n2−P A n n2 =12
n
!"# $ &'()*+
ðỀ THI 119
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