RT
输入一侧和另一侧的值，然后按计算按钮：
罪A =对立/斜边= a / c
cos A =相邻/斜边= b / c
棕褐色A =对面/相邻= a / b
csc A =斜边/相反= c / a
秒A =斜边/相邻= c / b
婴儿床A =相邻/对面= b / a
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