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$1+\cos^3 x-\sin^3 x=\sin x$

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tung89ctn

tung89ctn

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Giải pt

$$1+\cos^3 x-\sin^3 x=\sin x$$

 

(Đọc kỹ quy định trước khi đăng bài nhé bạn!)


Edited by Viet Hoang 99, 15-09-2014 - 11:59.





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