求∫cos(3x+1)dx.
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求∫cos(3x+1)dx.求∫cos(3x+1)dx.求∫cos(3x+1)dx.∫cos(3x+1)dx=(1/3)∫cos(3x+1)d3x=(1/3)∫cos(3x+1)d(3x+1)=(1/
求∫cos(3x+1)dx.
求∫cos(3x+1)dx.
求∫cos(3x+1)dx.
∫cos(3x+1)dx=(1/3)∫cos(3x+1)d3x=(1/3)∫cos(3x+1)d(3x+1)=(1/3)∫d(sin(3x+1))=(1/3)sin(3x+1)+C
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