Now, on to the subject of complex numbers. We have stayed away from this subject until now simply because we did not want to confuse things. Initially, it is easy to think of signals as “real valued.” ...

Imagine winding the hour hand of a clock back from 3 o’clock to noon. Mathematicians have long known how to describe this rotation as a simple multiplication: A number representing the initial ...

Should all students take Algebra 2? Florida seemed to say “no” this spring with the passage of a law striking it from graduation requirements. Texas said much the same in legislation Republican Gov.