已知|OA |=1,| OB |=2,∠AOB= 2π 3 , OC = 1 2 OA 1 4 OB ,则 OA 与 OC 的夹角大小为 .
已知|OA |=1,| OB |=2,∠AOB= 2π 3 , OC = 1 2 OA 1 4 OB ,则 OA 与 OC 的夹角大小为 .
发布时间:2024-05-11 16:15:05
已知|OA |=1,| OB |=2,∠AOB= 2π 3 , OC = 1 2 OA 1 4 OB ,则 OA 与 OC 的夹角大小为 .