Question

What is the polar form of `( 9,12 )`?

Answer 1

`(15,53.13^0)`

Explanation:

polar form is `(r,theta)`

`r=sqrt(x^2+y^2)=sqrt(9^2+12^2)`

`=sqrt(81+144)=sqrt(225)=15`

`tan theta = y/x =12/9`
`theta = tan^-1(12/9)`

`theta = 53.13^0`

the point of `(9,12)` is `(15,53.13^0)` in polar form.