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Member Since 30-03-2006
Offline Last Active 04-11-2006 - 16:25

04-11-2006 - 16:27

Giai phuong trinh :
sinX + sin2X + co2X = 0

28-09-2006 - 14:28

Cho 2(sinx)^4 + 3(cosx)^4=6/5
CMR : 16(sinx)^10 + 81(cosx)^10 = 1296/629

31-03-2006 - 23:08

Tam giac ABC co chu vi nho nhat khi nao?

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