Question

What is the Cartesian form of `(25,(-7pi )/4)`?

Answer 1

`(17.677,17.677)`

Explanation:

To change from polar form to Cartesian form, use `x=rcos theta` and `y=rsin theta`

`x=25cos ((-7pi)/4) = 17.677`

`y = 25sin ((-7pi)/4) = 17.677`

So in Cartesian form:

`(17.677,17.677)`