Question

1 multiple choice geometry question help will fan and medal

Answer 1

use polar co-ordinate system to describe the same position, you know that?

Answer 2

nope

Answer 3

well, in polar co-ordinate system, you assume an axis (say here x axis), the point's position vector is described by (r,theta) , where r is the distance from the origin and theta is the angle it made with the axis

Answer 4

Can you solve the problem for me stpe by step then I can take in all the information

Answer 5

so, you know how to calculate the distance from the origin using pythagoras theorem right?

Answer 6

I think so yes

Answer 7

@samsterz , can you calculate the distance of the point (20,-6) from the origin?

Answer 8

ok, then try and tell me what the answer is

Answer 9

ok now what about the degrees part

Answer 10

you can see clearly, if the line joining the origin and the point makes angle theta with the axis, then \[\tan \theta=-6/20\]
hence, \[\theta=\tan^{-1} (-6/20)\]
calculate

Answer 11

the polar co-ordinate position will be (distance, theta)

Answer 12

anyway, you have to calculate that theta value by radian

Answer 13

i got 21 miles at 17 degrrees south fo east, what did u get?

Answer 14

how much is 17 degree by radian?

Answer 15

0.297 radians

Answer 16

that's correct, so the position vector can be written as (21, -0.297) in polar co-ordinate system

Answer 17

so my answer was right

Answer 18

yes

Answer 19

thank you :) for your help arnab

Answer 20

you are welcome :) glad to help