thongho's Content
There have been 1 items by thongho (Search limited from 08-06-2020)
$3\cos^2 x - 2\cos x + 1 = \sin x - 2...in Phương trình, Hệ phương trình Lượng giácStarted by thongho, 13-10-2017 |
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There have been 1 items by thongho (Search limited from 08-06-2020)
$3\cos^2 x - 2\cos x + 1 = \sin x - 2...in Phương trình, Hệ phương trình Lượng giácStarted by thongho, 13-10-2017 |
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