First, the dividing by the square root of two is only valid on the pretty sine waves we were studying. Any more complex waveform required calculus to get the right answer. For example, a triangle ...

\({9}\) is a square number. \(3 \times 3 = 9\) \(3 \times 3\) can also be written as \(3^2\). This is pronounced "\({3}\) squared". \({8}\) is a cube number. The ...