A public house is up for sale.
网校学员unr**在学习英语零基础直达大学六级【2月特惠班】时提出了此问题，已有1人帮助了TA。
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令e^(-x)=sint，x=-ln(sint)，dx=-cottdt原式=∫cost*(-cott)dt
=-∫(cos^2t)/sintdt
=∫(sin^2t-1)/sintdt
=∫(sint-csct)dt
=-cost-ln|csct-cott|+C
=-√[1-e^(-2x)]-ln|e^x-e^x*√[1-e^(-2x)]|+C
=-√[1-e^(-2x)]-x-ln|1-√[1-e^(-2x)]|+C
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英语零基础直达大学六级【2月特惠班】
已有6人在本课程中发现了234个知识
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本课程热门知识点
- The man said that the pen was worth $50.
- What has to be paid for in the same way that goods are paid for?
- That is precisely the result the system is designed to produce.
- this race, which went on for exactly four months, was the last of its kind.
- The gaoler looked on eagerly, anxious to see if his fellow actor had at last learnt his lines.
- We owe a lot to the birds and beasts who eat insects.
- Most of us have formed an unrealistic picture of life on a desert island.
- There are plenty of high-rise windowsills to fall from!
- One of the things that fascinates us most about cats is the popular belief that they have nine lives.
- These friendly dogs were used as watchdogs even in Roman times.