04经济数学基础12试题定积分
使用部分积分公式
∫ (0,π/2)xsinxdx
= -∫ (0,π/2)xdcosx
= -[xcosx](0,π/2)+∞(0,π/2)cosxdx
= -(π/2 cos(π/2) - 0) + sinx(0,π/2)
= 1
回答不易,请及时采纳,谢谢!
∫ (0,π/2)xsinxdx
= -∫ (0,π/2)xdcosx
= -[xcosx](0,π/2)+∞(0,π/2)cosxdx
= -(π/2 cos(π/2) - 0) + sinx(0,π/2)
= 1
回答不易,请及时采纳,谢谢!