20/08/01 02:28:03.80 8FRQW1eF.net
-{cos(π/4) cos(x) - sin(π/4) sin(x)} = -cos(π/4 + x) = sin(x),
√2 は不要不急です。
20/08/01 02:28:03.80 8FRQW1eF.net
-{cos(π/4) cos(x) - sin(π/4) sin(x)} = -cos(π/4 + x) = sin(x),
√2 は不要不急です。
20/08/01 02:28:03.80 8FRQW1eF.net
-{cos(π/4) cos(x) - sin(π/4) sin(x)} = -cos(π/4 + x) = sin(x),
√2 は不要不急です。