chứng minh rằng: $sin4x=tanx$
Hình như đề có vấn đề bạn ơi??? –  NguyễnTốngKhánhLinh 20-06-13 08:03 PM
Đầu bài sai rồi bạn ơi –  Vô Minh 23-05-13 01:01 PM
Bài này mình không giúp được :) –  Trần Nhật Tân 22-05-13 10:57 PM

bị xóa vì bị trùng bởi Đức Vỹ 27-10-13 11:34 AM

Câu hỏi này có nội dung hoàn toàn trùng với câu hỏi đã có.

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