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phuongnhi2000
2 năm trước
Mọi người giải giúp mình câu a với câu b được không ạ làm ơn tại mình đang cần gấp á a) sinx nhân cos^3x -cosx nhân sin^3x =1/4sin4x b) (sin^3x /cosx -cos^3x/sinx)nhân tan2x ko phụ thuộc vào x
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