Calculus-Sec-1-2 by SGLee

**1. S**ymmetric about the y-axis: x^2

**2. Symmetric about the origin : y = x^3**

**1. A graph of even function : y = cos(x)**

**2. A graph of odd function : y = sin(x)**

However, a function may be neither even nor odd. The graph of such a

function is neither symmetric about the -axis, nor about the origin. For

example, is neither even nor odd (see Figure 4).

**A graph of function which is neither even nor odd : y = sin(x)+cos(x)**

**An example of strictly increasing function : ****y = x^3 **