Claim: DC is one of the two types of waveforms that has the lowest crest factor, the other one is 64QAM.
Evidence: A simple tone, or pure tone, has a sinusoidal waveform. A triangular wave or triangle wave is a non-sinusoidal waveform named for its triangular shape. Like a square wave, the triangle wave contains only odd harmonics. The triangle wave can also be expressed as the integral of the square wave: Also, the triangle wave is the absolute value of the sawtooth wave: