∫(x-2)√(4-x∧2)dx,上限为2,下限为-2

2024-12-02 15:23:54
推荐回答(1个)
回答1:

三角换元脱根号,换元x=2sinu
=∫(-π/2到π/2)(2sinu-2)2cosud2sinu
=8∫cos²usinu-cos²udu
=-8∫cos²udcosu-4∫cos2u+1du
=-8cos³u/3-2sin2u-4u+C