SubArea: Trigonometric equations and inequalitiesLevel: BProject ID: 1003085803Source Problem: 2010014903Accepted: 1Clonable: 1Easy: 0The solution set of the inequality cotgx≤3 for x∈R is:⋃k∈Z[π6+kπ; (k+1)π)⋃k∈Z[π6+2kπ; π2+2kπ]⋃k∈Z[π3+kπ; π2+kπ]⋃k∈Z[π3+2kπ; π2+2kπ]