Question

What is the Cartesian form of `( 8, (25pi)/8 )`?

Answer 1

`(-7.391, -3.061)`

Explanation:

The conversion from polar to cartesian coordinates is:
`(x,y) = (rcostheta, rsintheta)`

`x = rcostheta = 8cos(25pi/8)= -7.391`
`y = rsintheta = 8sin(25pi/8) = -3.061`

So the cartesian coordinates are `(-7.391, -3.061)`