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arctanx+arctan(1/x)=?已知x>0.
人气:141 ℃ 时间:2019-12-07 15:17:15
解答
let
tana = x
then arctanx = a
cota = 1/x
arctan(1/x) = 90°-a
arctanx+arctan(1/x)= 90°
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