@[秦锐](/space/show?uid=178290) 学完初中数学再来，谢谢（
by Le_temps_des_fleurs @ 2019-01-29 12:18:29
查百度，问度娘
by dinghongyu @ 2019-01-29 12:22:38
>$sinA=\texttt{角A的对边/斜边}$
by t162 @ 2019-01-29 12:27:00
$\sin x=\sum_{n=0}^{\infty}\frac{(-1)^{n-1}x^{2n-1}}{(2n-1)!}$
by Anvet @ 2019-01-29 12:31:54
@[绝影·天冥](/space/show?uid=111748) 正解
by Xecades @ 2019-01-29 12:38:02
五年级的蒟蒻一脸懵QAQ
by std_DFS @ 2019-06-27 16:15:16
@[Neptune_Disaster](/space/show?uid=108185) 我刚学完初一数学
by Disaster_Terminator @ 2019-07-27 11:55:10