Signum Function: Basics, Graph and Relationship with Unit Step Signal in Signals and Systems Video Lecture | Crash Course for GATE Instrumentation Engineering

Writing the Equation of a Sine Function Given its Graph | Trigonometry | Study.com

The signum (or sign) function, denoted by sgn, is defined by sgn x={ -1 if x<0 0 if x=0 1 if x>0 . (a) Sketch the graph of this function. (b) Find each of the following limits or explain why it does not exist. (i) limx →0^+ sgn x (ii) limx →0^- sgn x (iii) limx →0 sgn x (iv) limx →0|sgn x| | Numerade