Question

What is the Cartesian form of `(66,(11pi)/16))`?

Answer 1

`{{-36,67},{54,88}}`

Explanation:

`(r,theta)" the polar form"`
`(color(red)(r*cos theta),color(green)(r*sin theta))" the Cartesian form"`

`r=66`

`theta=(11pi)/16`
`x=66*cos(11pi)/16=-36,67`
`y=66*sin(11pi)/16=54,88`

`{{-36,67},{54,88}}`