∫(sinxcosx)/(sinx+cosx)dx=?
2个回答
展开全部
∫ (sinxcosx)/(sinx + cosx) dx=(1/2)(- cosx + sinx) - [1/(2√2)]ln|csc(x + π/4) - cot(x + π/4)| + C。C为积分常数。
解答过程如下:
∫ (sinxcosx)/(sinx + cosx) dx
= (1/2)∫ (2sinxcosx)/(sinx + cosx) dx
= (1/2)∫ [(1 + 2sinxcosx) - 1]/(sinx + cosx) dx
= (1/2)∫ (sin²x + 2sinxcosx + cos²x)/(sinx + cosx) dx - (1/2)∫ dx/(sinx + cosx)
= (1/2)∫ (sinx + cosx)²/(sinx + cosx) dx - (1/2)∫ dx/[√2sin(x + π/4)]
= (1/2)∫ (sinx + cosx) dx - [1/(2√2)]∫ csc(x + π/4) dx
= (1/2)(- cosx + sinx) - [1/(2√2)]ln|csc(x + π/4) - cot(x + π/4)| + C
解答过程如下:
∫ (sinxcosx)/(sinx + cosx) dx
= (1/2)∫ (2sinxcosx)/(sinx + cosx) dx
= (1/2)∫ [(1 + 2sinxcosx) - 1]/(sinx + cosx) dx
= (1/2)∫ (sin²x + 2sinxcosx + cos²x)/(sinx + cosx) dx - (1/2)∫ dx/(sinx + cosx)
= (1/2)∫ (sinx + cosx)²/(sinx + cosx) dx - (1/2)∫ dx/[√2sin(x + π/4)]
= (1/2)∫ (sinx + cosx) dx - [1/(2√2)]∫ csc(x + π/4) dx
= (1/2)(- cosx + sinx) - [1/(2√2)]ln|csc(x + π/4) - cot(x + π/4)| + C
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
名片
2024-10-28 广告
2024-10-28 广告
作为优菁科技(上海)有限公司的一员,Altair HyperWorks是我们重点代理的CAE软件套件。该软件以其全面的仿真能力、丰富的建模工具和高效的优化设计功能著称,广泛应用于汽车、航空航天、能源及电子等行业。HyperWorks通过集成...
点击进入详情页
本回答由名片提供
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询