计算:sin[arctan(775/168)]的值
求(775/168)的反正切,再求正弦值
x = arctan(775/168)
tanx = 775/168
sinx = 775/√( 775^2 + 168^2 ) = 775/793
故 sin [ arctan(775/168) ] = sinx = 775/793 。
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求(775/168)的反正切,再求正弦值
x = arctan(775/168)
tanx = 775/168
sinx = 775/√( 775^2 + 168^2 ) = 775/793
故 sin [ arctan(775/168) ] = sinx = 775/793 。
上一篇:带着固态硬盘能刷BIOS吗?