. |
If f(x)
= A· cos(bx
+ c) and
A,
b,
and
c
are real numbers with
b is not equal 0,
then the affect of the factor
A is to vertically stretch
(|A|>1)
or compress
(|A|<1)
the graph of the function
f(x) = cos(bx + c).
Also, if
A < 0,
the basic cosine curve is reflected in the x-axis. |
|