=∫ ( + ) =∫2( + )22 31 3SINXXXXCOSSINCOS00ΠΠ22DX DX∫ Π Π Π+ = ∫XTỚN...

1. ⁼

∫ (

₊

)

⁼

∫

²

(

₊

)

2

2

3

1

3

sinxcos

0

π2

dx

dx

∫ _π ^{π π}

+ = ∫

x

Tớnh I

1

+I

2

=

( ) ₎ ^{2 1 tan( 4 )} ₀ ^{2 1}

2

= − =

sin

−

cos 2

cos

00 2

( 4

1

⇒ I= 7I

1

-5I

2

=1 I

1

=I

2

=

n



2

+

2

biết n thoả món:

2

²

¹

²³





3

1

C