Find the domain and range of this function:
f(x) = cosx/x.
I just took a quiz today and I blanked out. I wasn't sure what notation you are supposed to use for this kind of problem so I probably got it wrong.
When the denominator is large, the number is smaller, and vice versa when the denominator is small.
Would the range be (-infinity, +infinity)?
Also, how do I know which notation to use when doing domain and range of a function? ie. The parenthetical notation or using "less than or equal to" signs?
All notations are equivalent, it's just personal preference (I go for whichever one is easiest to write in each case).