import java.lang.Math; void: main(String[]: args) = { output << "atan2(1, 2) = " << atan2(1.0, 2.0) << "\n"; output << "atan2(1, 2) = " << Math.atan2(1.0, 2.0) << "\n"; output << "atan2(1, 2) = " << java.lang.Math.atan2(1.0, 2.0) << "\n"; }