楼上的”提斜公式得√(1+w²)sin(wt+π/4)=0“是错的应该是,提斜公式得√(1+w²)[1/√(1+w²) cos(wt)+w/√(1+w²) sin(wt)]=√(1+w²)[sin a cos(wt)+cos a sin(wt)]=√(1+w²)sin(wt+a)=0...