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tan-1等于多少度
更新时间: 2020-10-28 00:00:00  

135度。Tan是正切的意思,角θ在任意直角三角形中,与θ相对应的对边与邻边的比值叫做角θ的正切值。若将θ放在直角坐标系中,就是tanθ=y/x。

tan在直角坐标系中相当于直线的斜率k。正切tangent在上世纪九十年代以前正切函数是用tgθ来表示的,而现在用tanθ来表示。

关键词: tan 等于 多少

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