s3-ap-southeast-1.amazonaws.com fileCâu 78: Voi gia tri nao cua m thi phuong trinh cos2 x + 2 sin...
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s3-ap-southeast-1.amazonaws.com fileCâu 78: Voi gia tri nao cua m thi phuong trinh cos2 x + 2 sin xcosx— sin x = m, co nghiêm? — tan x +3 trên donn [0; z] la: Sô nghiêm cua
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