Question

Help please

Answer 1

Change r=3costheta-2sintheta to rectangular form

Answer 2

@dan815 @freckles @SyedMohammed98 @kidrah69 @welshfella

Answer 3

cos theta = x/r; sin theta = y/r
r^2 = x^2 + y^2

just go at it that way...and you will come out the other end.

Answer 4

So I do 3^2-2^2? @IrishBoy123

Answer 5

??

you could start r = 3x/r - 2y/r and then cross multiply by r, recognising that r^2 = x^2 + y^2

then complete some squares

Answer 6

So I plug it in? r^2=3x/r^2-2y/2^2? I'm sorry. I'm really confused

Answer 7

@IrishBoy123

Answer 8

r=3 (x/r)-2(y/r)
r^2 = 3x - 2y
x^2 + y^ 2 = 3x - 2y
complete squares