# How do you find the domain & range for #f(x) = 2cos(4x + pi) -1 #?

##### 1 Answer

Nov 14, 2015

DOMAIN

The domain of definition of a function is represented by points on the x-axis where the function is defined.

Here, the function

RANGE

The range of any cosine function (regardless of its argument) is

Thus the range for this function is: