A. 1
B. 0
C. 2/3
D. 3/2
A. cos2x-sinx2+12-1cos2x
B. 2cos2x-xsinx2+12-12xcos2x
C. -2cosx+xsinx2+12-12xcos2x
D. 2cos2x+xsinx2+12-12xcos2x
A. cos2x.4cos2x+1sin21x2-cos2x4sin3x
B. 2cos4x+2x3sin21x2
C. 2cos4x+2xsin21x2
D. 2cos4x-2x3sin21x2
A. 0
B. 2
C. 1/2
D. 1/4
A. cosx+sinxsinx-cosx
B. -1cos2x+π4
C. 1cos2x+π4
D. -2sinxsinx-cosx2
A. 3sin22x+12sin32x+1
B. 3sin2x+1cos2x+1
C. 3sin222x+12sin32x+1
D. 3sin2x+1
A. 15x-22cos4x+1x-2sinx+1x-2
B. -5cos4x+1x-2sinx+1x-2
C. 5cos4x+1x-2sinx+1x-2
D. -15x-22cos4x+1x-2sinx+1x-2
A. 1sin2x3+2tanx
B. -1sin2x3+2tanx
C. 1cos2x3+2tanx
D. -1cos2x3+2tanx
A. 2x-1sin2x2-x+1
B. -2x-1sinx2-x+1
C. 2x-1cos2x2-x+1
D. 1-2xsin2x2-x+1
A. -6cos5xsinx
B. 6cos5xsinx
C. 6sin5xcosx
D. 6cos5 x
A. x=π12+kπ hoặc x=-3π8+kπ2 k∈ℤ
B. x=-π12+kπ hoặc x=-3π8+kπ2 k∈ℤ
C. x=-π12+kπ hoặc x=3π8+kπ2 k∈ℤ
D. x=π12+kπ hoặc x=3π8+kπ2 k∈ℤ
A.−x2.sin2x(cosx+xsinx)2
B.−x2.sin2x(cosx+xsinx)2
C.−x2.cos2x(cosx+xsinx)2
D.xcosx+xsinx2
A.π+k2π
B.2π+k4π
C.2π+kπ
D.π+kπ
A.y'=1sinx−1cosx
B.y'=1sinx+1cosx
C.y'=cosxsinx+sinxcosx
D.y'=cosxsinx−sinxcosx
A.y'=sin8x+452cos5x.sin10x
B.y'=8sin8x+52cos5x.sin10x
C.y'=8sinx+452cos5x.sin10x
D.y'=8sin8x+452cos5x.sin10x
A.y'=6sin4x2+sin22x3.
B.y'=3sin4x2+sin22x2.
C.y'=sin4x2+sin22x2.
D.y'=6sin4x2+sin22x2.
A.y'=122+tanx+1x⋅
B.y'=1+tan2x+1x22+tanx+1x⋅
C.y'=1+tan2x+1x22+tanx+1x.1−1x2.
D.y'=1+tan2x+1x22+tanx+1x.1+1x2.
A.y'=−2cotcosx1sin2cosx+cosx2sinx−π2.
B.y'=2cotcosx1sin2cosx.sinx+cosx2sinx−π2.
C.y'=−2cotcosx1sin2cosx+cosxsinx−π2.
D.y'=2cotcosx1sin2cosx.sinx−cosxsinx−π2.
A.−1+cos2x2sin3x
B.−1+sin2x2sin3x
C.1+sin2x2sin3x
D.3sin2x1+cosx3
A.sin2x1+cosx3
B.3sin2x1+cosx2
C.2sin2x1+cosx2
A.y'=coscos2x.tan2x− sin2xtan2x+2tanx
B.y'=coscos2x.tan2xsin2xtan2x+tanx
C.y'=coscos2x.tan2x−sin2xtan2x+tanx
D.y'=coscos2x.tan2xsin2xtan2x+2tanx
A.62sin2x−cos2x2
B.−6sin2x−cos2x2
C.62sin2x−cosx2
D.−62sin2x−cos2x2
A.y'=sin2costan43x.sintan43x.4tan33x.1+tan23x.3
B.y'=sin2costan43x.sintan43x.tan33x.1+tan33x.
C.y'=−sin2costan43x.sintan43x.4tan33x.1+tan23x.3
D.y'=sin2costan43x.sintan43x.4tan33x
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