分からない問題はここ ..
923:132人目の素数さん
20/09/05 12:52:12.18 sjSgt5Lc.net
>>895
S = (1/2)∫θ^2 dθ - (1/2)∫{θ sin(8πθ)}^2 dθ
= (1/2)∫θ^2 cos(8πθ)^2 dθ
= (1/4)∫θ^2 {1+cos(16πθ)} dθ
= (1/4)∫θ^2 dθ + (1/4)∫θ^2・cos(16πθ) dθ
= [ (1/12)θ^3 + θ^2・sin(16πθ)/(64π) ] - ∫θ・sin(16πθ)/(32π) dθ
= [ (1/12)θ^3 + θ^2・sin(16πθ)/(64π) + θ・cos(16πθ)/(512π^2) ]
- ∫cos(16πθ)/(512π^2) dθ
= [ (1/12)θ^3 + θ^2・sin(16πθ)/(64π) + θ・cos(16πθ)/(512π^2)
- sin(16πθ)/(8192π^3) ](θ=0,π/4)
= (π^3)/768 + π・sin(4π^2)/1024 + cos(4π^2)/(2048π) - sin(4π^2)/(8192π^3)
= 0.04333824242
次ページ続きを表示1を表示最新レス表示スレッドの検索類似スレ一覧話題のニュースおまかせリスト▼オプションを表示暇つぶし2ch
1326日前に更新/373 KB
担当:undef