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Solution inequality：
Directly input the univariate inequality (that is, the inequality containing only one variable), set the angular unit (radian or angle) of the trigonometric function, and click the "Next" button to obtain the solution set of the inequality.
It supports mathematical functions (including trigonometric functions).
Directly input the univariate inequality (that is, the inequality containing only one variable), set the angular unit (radian or angle) of the trigonometric function, and click the "Next" button to obtain the solution set of the inequality.
It supports mathematical functions (including trigonometric functions).
Current location：Mathematical operation > History of Inequality Computation > Answer
Bad input!Please check agin.
以下题目输入有误或有空行，请仔细检查，改正后再计算：
1==>错误类型：输入错误(3): -1
==>指导建议：
解多元方程，可以点击解多元方程
或者仔细阅读下面的“数学函数”和“使用须知”栏目。
若问题没有得到解决，请参阅：《热点问题》