Find a volume of a prism

What basic trigonometric identity would you use to verify that csc x sec x cot x = csc^(2)x

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1

Acd that is originally priced at $15.85 red-tagged for the sale. what is the sale price of the cd