高校数学の質問スレ Part437

>>699
S = ∫[0,π] y dx
　= ∫[0,π] sin(x) dx
　= [ -cos(x) ](x=0→π)
　= 2,
2S・Y = ∫[0,π] yy dx
　= ∫[0,π] (sin x)^2 dx
　= (1/2)[ x − sin(x)･cos(x) ](x=0→π)
　= π/2,
Y = π/4S = π/8,
G (π/2, π/8)