Question

Find a polar form of the equation 2x+2y=5.

a.) 2r=5
b.) 2r cos theta + sin theta = 5
c.) 2 sin theta + 2 cos theta = 5
d.) 2r^(2)=5

Answer 1

just plug in x = r cos theta
y = r sin theta

Answer 2

in a calculator?

Answer 3

in your expression
2x+2y = 5

replace x by r cos theta
y by r sin theta
what u get ?

Answer 4

2r cos theta + 2r sin theta = 5?

Answer 5

yes!

Answer 6

oh, its c?

Answer 7

no, its b

Answer 8

i am sure b is
2r (cos theta + sin theta )= 5