SubArea: Primitive functionLevel: CProject ID: 1003107906Accepted: 1Solve the indefinite integral ∫dxcotgx⋅sin2x in the range (0;π2).12tgx+c, c∈R12cotgx+c, c∈Rln|sin2x|+c, c∈R−12tgx+c, c∈R