Question

What is the Cartesian form of `( -1 , ( 7pi)/3 )`?

Answer 1

`(-1/2,-sqrt3/2)`

Explanation:

`x = rcostheta`
`x = (-1)cos(7pi)/3`
`x=-1/2`

`y = rsintheta`
`y = (-1)sin(7pi)/3`
`y= -sqrt3/2`