BÀI 3. 2 3 2(COS 1) COS .I X X DX= Ị -0P PP PCOS . 1 (1 COS 2 ).• A =...

1.

²

(

³

)

²

∫

− ^{(A_09);I =158 −π4 2.I}

²

₀

_cos

²

^{sin 2}_{x 4 sin}^x

²

_x ^dxc x c xdxos 1 os=

ị

+ ( ĐH-KA-2006)

0

π

p

=

∫

+ ^{(A_05);I = 3427 4.}

²

sin 2 sinxI x dxsin 2 . cosx x