Question

conversion cartesian to polar. help!! xy= 3 (x+y). the answer is r= 3(csctheta + sectheta). i subtituted the x as rcos theta and rsintheta.. and then im lost..

Answer 1

@AllTehMaffs ??

Answer 2

hallo

Answer 3

wanna help? please

Answer 4

what did you get when you substituted those terms in?

Answer 5

i got stuck up.. (rcostheta)(rsintheta) = 3(rcostheta + rsintheta)

Answer 6

exactly :) What does the left side simplify to? (You only have to move the r's around)

Answer 7

so.. r(costhetasintheta) ?

Answer 8

almost. it's r*r costhetasintheta, right?

Answer 9

yeah.. oh im so stupid

Answer 10

r^2 (costheta sintheta)

Answer 11

there are too many letters in these maths methinks :)

Yup, that's it! Now what can you pull anything out of the parenthesis on the right hand side?

Answer 12

the r?

Answer 13

yup yup. Do you see where it's going from here?

Answer 14

so divide its by r??