Trang Ánh Nam has left a new comment on your post "CÁC HỆ THỨC LƯỢNG TRONG TAM GIÁC VÀ GIẢI TAM GIÁC":
Câu 30: Cho tam giác ABC có AB=10, AC=4, góc A=60 độ.
a. Tính chu vi tam giác ABC.
b. Tính tanC
c. Lấy điểm D trên tia đối của tia AB sao cho AD=6 và điểm E trên tia AC sao cho AE=x. Tìm x để BE là tiếp tuyến của đường tròn (C) ngoại tiếp tam giác ADE.
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Posted by Trang Ánh Nam to Học Để Thi at February 21, 2019 at 10:38 PM
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