👉 Learn how to verify trigonometric identities having rational expressions. To verify a trigonometric expression means to verify that the term on the left-hand side of the equality sign is equal to ...

👉 Learn how to verify trigonometric identities involving the addition and subtraction of terms. To do this it is usually useful to convert the addition or subtraction terms in terms of one ...

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 ...