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hocthidh


Khi di thi gap bai toan viet pt tiep tuyen voi do thi hop voi 1 dt khac goc A thi co duoc SD pt : tan(A)= tri tuyet doi ( k1-k2)/(1+k1.k2) khong?????
k la he so goc cua cac dt.
neu dung co bị tru diem khong , neu khong biet ban nao hoi cac thay ho minh voi, cam on
k la he so goc cua cac dt.
neu dung co bị tru diem khong , neu khong biet ban nao hoi cac thay ho minh voi, cam on