I'm really having trouble simplifying trigonometric expressions, i understand the identities, but sometimes i get stuck, and really need an explanation

sint + tan t

tan t

What is this inequality notation? t is less then or equal to 2

Which representation has a constant of variation of -2.5

This stem-and-leaf plot represents the heights of the students on ralph's basketball team. one student's height is missing from the plot. if the mean height of all the students on the team is 61 inches, what is the missing height? a. 55 in. b. 59 in. c. 61 in. d. 65 in.