/ 4  76. / 4( 1)COSX X DX(ĐHNV 06) (CĐ ĐD 06) X1 2SIN 2X DX00...

75.

/ 4

76.

/ 4

( 1)cosx x dx(ĐHNV 06) (CĐ ĐD 06)

x1 2sin 2x dx

0

x

78.

/ 2

4

2

4sine