θ=arctan(4/3)=53.13° 怎么算出53.13°的
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θ=arctan(4/3)=53.13° 怎么算出53.13°的
θ=arctan(4/3)=53.13° 怎么算出53.13°的
θ=arctan(4/3)=53.13° 怎么算出53.13°的
如果精确不到百分位的话,我可以算出来,要精确到百分位的话,需要借助计算机.
因为tanθ=4/3=sinθ/cosθ=4/5÷3/5
所以sinθ=4/5=53°
其实这是3.4.5这组勾股数构成的三角形的角
知道arctan 的角度范围是-π/2到π/2就行,这种东西不会让你算的,按计算器就行,3-4-5直角三角形的两个锐角也没有要求记住的
arctan(-2)+arctan(-3)=?
θ=arctan(4/3)=53.13° 怎么算出53.13°的
arctan(tanθ)=?
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