化简(tanx+cosx)cos^2x
人气:372 ℃ 时间:2020-04-09 20:13:31
解答
(tanx+cosx)*(cosx)^2
=(sinx/cosx+cosx)*(cosx)^2
=((sinx+(cosx)^2)/cosx)*(cosx)^2
=(sinx+(cosx)^2)*cosx
=sinx*cosx+(cosx)^3
=sin(2x)/2+(cosx)^3
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