ln(secx+tanx)+c是secx的不定积分吗
怎么推的
人气:462 ℃ 时间:2020-04-09 01:57:55
解答
∫ secx dx
=∫ [1/(secx+ tanx ) ]d(secx+ tanx)
=ln|secx+tanx| + C能详细点吗?中间怎么变的能详细点吗?中间怎么变的d(secx+tanx)
=[secxtanx+ (secx)^2] dx
=secx [tanx+ secx] dx
∫ secx dx
=∫ [1/(secx+ tanx ) ]d(secx+ tanx)
=ln|secx+tanx| + C不用客气
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