# MATH

posted by
**Daisy**
.

I have a test in about an hour and a half and am having some difficulty on the review the teacher gave us to help us prepare. Any help would be great!

*Convert the polar equation to a rectangular equation.

rsin(theta - Pi/4) =5

-The answer is given as y= x+5sq.rt.2

Also, I have a problem on here that says to "use a graphing utility to find the rectangular coordinates of the point to two decimal places."

Polar Coordinates (-2.2, 5pi/9 )

How do I input this in a TI-84 calculator?