Factor and simplify: csc^4x - cot^4x

For the record, I know what the answer is (2csc^2-1) but I don’t know the solving steps.

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

One of every 20 customers reports poor customer service on your company’s customer satisfaction survey. you have just created a new process that should cut the number of poor customer service complaints in half. what percentage of customers would you expect to report poor service after this process is implemented? 1.) 5% 2.) 10% 3.) 2% 4.) 2.5%

For the quadratic function [tex]y=(x+4)^2-1[/tex] , do the following: a) rewrite the function in the standard form, b) rewrite the function in intercept form, c) find the vertex, d) find the y-intercept, e) find the x-intercepts.