What is the constant of proportionality, y/X

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

Which function families have maximums and minimums? 1.)linear absolute value functions and exponential functions 2.) linear absolute value functions and quadratic functions 3.) linear absolute value functions and linear functions 4.) linear absolute value functions and constant functions

Which of the following is the shape of a cross section of the figure shown below