Question

Polar coordinates of a point are given. Find the rectangular coordinates of the point.
(2.1, 2pie/9)

Answer 1

I think it is pie that confuses me

Answer 2

\(x=2.1\cos(\frac{2\pi}{9})\) and \(y=2.1\sin(\frac{2\pi}{9})\) and a calculator for this one i think because i have no idea what that is

Answer 3

x=2.099844112
y=.0255872301

Answer 4

that is not what i get
http://www.wolframalpha.com/input/?i=2.1+cos%282pi%2F9%29

Answer 5

i think i don't have my calculator set right

Answer 6

{1.60869, 0.642788}

Answer 7

better be in "radian" mode

Answer 8

so x= 1.6 and y= 1.3

Answer 9

no it is in degree that is the problem

Answer 10

thank you