Question

Convert -3R - 4U to polar form

Answer 1

what you mean polar form? complex number or polar cordinates?

Answer 2

polar coordinates

Answer 3

is that yu are given ?

Answer 4

all*

Answer 5

yep

Answer 6

\[x = r \cos \theta \leftarrow \rightarrow y =r \sin \theta\]\[\theta = \tan^{-1} (y/x)\] Does this help ?

Answer 7

not really :( sorry!

Answer 8

hmm... ok. so are you assuming R is y and U is x in this case then ?

Answer 9

yea

Answer 10

ok so rearranging we have:

R = x = r cos (@)
U = y = r sin (@)

hence,
-3R - 4U
-3 (r cos(@)) - 4 (r sin(@))

where @ = tan^(-1) (u/r) = tan^-1 [(r sin@)/(r cos@)]

r = sqrt { r^2 + u^2 }


can you solve it now?

Answer 11

yes it think so thanks alot!!!!

Answer 12

np