A Note on Notation

For quite awhile I’ve been writing sin(x), ln(x) and the like with parentheses instead of the usual sin x or ln x . The main reason is that I want to emphasize that  sin(x), ln(x), etc. are the same level and type of notation as f(x). The only difference is that sin(x) and ln(x) always represent the same function, while things like f(x) represent different functions…