∫ (COS 6X−COS 4X DX) LÀ A
Câu 19.∫ (cos 6x−cos 4x dx
∫ (cos 6x−cos 4x dx)
là A.6sin 6x 5sin 4x C− +B. 1 1sin 6x sin 4x C− + +
C.−6sin 6x sin 4x C+ +
D.1 16 46 −4 +
C.−6sin 6x sin 4x C+ +
D.1 16 46 −4 +