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

13.

⁴

²

∫

+ (ĐH_B_03); 1x1 sin 2

0

π

( )

∫

+ +x x x csin 1 osx

4

ln 2 1dxI = +π ^ π + ÷^÷÷xsinx+cosx4 2 4 (A_11);