cos 90 x Cosine. 掃二維碼下載作業幫拍照搜題, https://shrink.im/a0xve 0 0 cooldude_raj07 1 0 年前sin(A+B) =sinA.Cosb + cosA.SinB. Auladeciclotrigonometrico
確定! 回上一頁