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cm sin (1) la so vo ty
???????
jo jack
bai rat hay
18-12-2006 - 11:07
tim so k lon nhat sao cho
sin^{2}A+sin^{2}B>k*sin^{2}C
tam giac ABC
sin^{2}A+sin^{2}B>k*sin^{2}C
tam giac ABC
tim nghiem
18-12-2006 - 10:59
cho bt a(co sx-1)+b^{2} +1+co s(a*x+b^{2} )=0
tim a,b de bt dung x
tim a,b de bt dung
x
