Which is bigger 3/7 or 2/5

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

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?