作业帮[lg(2sinx-1)+根号(-tanx-1)]的定义域真数大于0,开方数不小于02sinx-1>0,-tanx-1≥0sinx>1/2,tanx≤-1作出单位圆,易得2kπ+(π/6)
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/04 10:08:34
![[lg(2sinx-1)+根号(-tanx-1)]的定义域真数大于0,开方数不小于02sinx-1>0,-tanx-1≥0sinx>1/2,tanx≤-1作出单位圆,易得2kπ+(π/6)](/uploads/image/z/3859590-30-0.jpg?t=%5Blg%282sinx-1%29%2B%E6%A0%B9%E5%8F%B7%28-tanx-1%29%5D%E7%9A%84%E5%AE%9A%E4%B9%89%E5%9F%9F%E7%9C%9F%E6%95%B0%E5%A4%A7%E4%BA%8E0%2C%E5%BC%80%E6%96%B9%E6%95%B0%E4%B8%8D%E5%B0%8F%E4%BA%8E02sinx-1%3E0%2C-tanx-1%E2%89%A50sinx%3E1%2F2%2Ctanx%E2%89%A4-1%E4%BD%9C%E5%87%BA%E5%8D%95%E4%BD%8D%E5%9C%86%2C%E6%98%93%E5%BE%972k%CF%80%2B%28%CF%80%2F6%29)
[lg(2sinx-1)+根号(-tanx-1)]的定义域真数大于0,开方数不小于02sinx-1>0,-tanx-1≥0sinx>1/2,tanx≤-1作出单位圆,易得2kπ+(π/6)
[lg(2sinx-1)+根号(-tanx-1)]的定义域
真数大于0,开方数不小于0
2sinx-1>0,-tanx-1≥0
sinx>1/2,tanx≤-1
作出单位圆,易得
2kπ+(π/6)
[lg(2sinx-1)+根号(-tanx-1)]的定义域真数大于0,开方数不小于02sinx-1>0,-tanx-1≥0sinx>1/2,tanx≤-1作出单位圆,易得2kπ+(π/6)
完全正确