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anhkosai
2 năm trước
mọi ng chỉ em với : 1) sin3x = -1/2 2) cos2x = -√2/2 ( trừ căn 2 phần 2 ) 3) sin2x - sin2xcosx = 0 4) sin3x - cos2x = 0 5) tan4x . tan2x = 1 6) 2cos ( x - π/6 ) + 1 = 0 7) tan ( 2x + π/3 ) + tan3x = 0 giải giúp em vote 5 sao luôn
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