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sin3/4兀等于多少

更新时间: 2020-11-18 00:00:00     

sin(3π/4)=√2/2,结果计算过程如下sin(3π/4)=sin(π/4)=sin45°=√2/2。sin45°表示的是角度为45°的角的对边与斜边之比。

k×π/2±a(k∈z)的三角函数值:

1、当k为偶数时,等于α的同名三角函数值,前面加上一个把α看作锐角时原三角函数值的符号;

2、当k为奇数时,等于α的异名三角函数值,前面加上一个把α看作锐角时原三角函数值的符号。

关键词: sin3 等于 多少

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