解不等式x/√(1+x^2)>(x^2-1)/(x^2+1) 解不等式x/√(1+x^2)>(x^解不等式x/√(1+x^2)>(x^2-1)/(x^2+1)解不等式x/√(1+x^2)>(x^2-1)/(x^2+1)吴强芾 2010-8-110分钟内有问必答 前往下载令x=tanA,A∈(-π/2,π/2)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 17:00:47
![解不等式x/√(1+x^2)>(x^2-1)/(x^2+1) 解不等式x/√(1+x^2)>(x^解不等式x/√(1+x^2)>(x^2-1)/(x^2+1)解不等式x/√(1+x^2)>(x^2-1)/(x^2+1)吴强芾 2010-8-110分钟内有问必答 前往下载令x=tanA,A∈(-π/2,π/2)](/uploads/image/z/2542414-22-4.jpg?t=%E8%A7%A3%E4%B8%8D%E7%AD%89%E5%BC%8Fx%2F%E2%88%9A%281%2Bx%5E2%29%EF%BC%9E%28x%5E2-1%29%2F%28x%5E2%2B1%29+%E8%A7%A3%E4%B8%8D%E7%AD%89%E5%BC%8Fx%2F%E2%88%9A%281%2Bx%5E2%29%EF%BC%9E%28x%5E%E8%A7%A3%E4%B8%8D%E7%AD%89%E5%BC%8Fx%2F%E2%88%9A%281%2Bx%5E2%29%EF%BC%9E%28x%5E2-1%29%2F%28x%5E2%2B1%29%E8%A7%A3%E4%B8%8D%E7%AD%89%E5%BC%8Fx%2F%E2%88%9A%281%2Bx%5E2%29%EF%BC%9E%28x%5E2-1%29%2F%28x%5E2%2B1%29%E5%90%B4%E5%BC%BA%E8%8A%BE%26%23160%3B%26%23160%3B2010-8-110%E5%88%86%E9%92%9F%E5%86%85%E6%9C%89%E9%97%AE%E5%BF%85%E7%AD%94+%E5%89%8D%E5%BE%80%E4%B8%8B%E8%BD%BD%E4%BB%A4x%3DtanA%2CA%E2%88%88%28-%CF%80%2F2%2C%CF%80%2F2%29)
解不等式x/√(1+x^2)>(x^2-1)/(x^2+1) 解不等式x/√(1+x^2)>(x^解不等式x/√(1+x^2)>(x^2-1)/(x^2+1)解不等式x/√(1+x^2)>(x^2-1)/(x^2+1)吴强芾 2010-8-110分钟内有问必答 前往下载令x=tanA,A∈(-π/2,π/2)
解不等式x/√(1+x^2)>(x^2-1)/(x^2+1) 解不等式x/√(1+x^2)>(x^
解不等式x/√(1+x^2)>(x^2-1)/(x^2+1)
解不等式x/√(1+x^2)>(x^2-1)/(x^2+1)
吴强芾 2010-8-1
10分钟内有问必答 前往下载
令x=tanA,A∈(-π/2,π/2)
则原不等式可化为2sin^2A-sinA-1<0怎么化来的
解不等式x/√(1+x^2)>(x^2-1)/(x^2+1) 解不等式x/√(1+x^2)>(x^解不等式x/√(1+x^2)>(x^2-1)/(x^2+1)解不等式x/√(1+x^2)>(x^2-1)/(x^2+1)吴强芾 2010-8-110分钟内有问必答 前往下载令x=tanA,A∈(-π/2,π/2)
x/√(1+x^2)>(x^2-1)/(x^2+1)
tanA/√(1+tan^2A)>(tan^2A-1)(tan^2A+1)
tanA/√(1+sin^2A/cos^2A)>(sin^2A/cos^2A-1)/(sin^2A/cos^2A+1)
tanA/√((cos^2A+sin^2A)/cos^2A)>(sin^2A-cos^2A)/cos^2A)/(sin^2A+cos^2A)/cos^2A)
tanA/√(1/cos^2A)>(-cos2A)
sinA+cos2A>0
sinA+1-2sin^2A>0
2sin^2A-sinA-1