How do you write cos, tan, and sec in terms of csc?

Abbey purchased a house using a fixed rate mortgage. the annual interest rate is 4.2% compounded monthly for 20 years. the mortgage amount is $235,000. what is the monthly payment on the mortgage? this isn't a multiple choice question have to show my work

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

How can you construct perpendicular lines and prove theorems about perpendicular lines