Calculus-Sec-1-2 by SGLee

1. Symmetric 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