Expressions are a useful tool, however they can become confusing as the variables all are global. Changing x changes the value of any expression involving x. This is not usually how we want things to ...

January 28, 2011 Add as a preferred source on Google Add as a preferred source on Google If you've made it this far in our programming lessons, you've arrived at the reward. Today we're learning about ...

Plot tan, cot, sec and csc on the interval [-2Pi, 2Pi]. (Note that these functions all have vertical asymptotes.) You should know these graphs well. The trigonometeric functions are all periodic, that ...