Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Easy math questions please help?
Test the equation for symmetry with respect to the specified axis, line, or pole.
r=4+2sinΘ with the line Θ=pie/2
and
r=4+2cosΘ with the pole
obviously I did try *** hole. If you dont know how to do it then why comment?
2 Answers
- calzrheLv 78 years agoFavorite Answer
For the first one you can check to see if r(Θ) = r(π-Θ)
This is because π-Θ gives the reflection of Θ about the y-axis. Plug in some values and see for yourself.
4+2sin(π-Θ) = 4+2[sin(π)cos(Θ) - sin(Θ)cos(π)]
= 4+2[0- (-sinΘ)]
=4+2sinΘ
For the second one you can check to see if r(Θ) = r(Θ+π)
This is because Θ+π gives the reflection of Θ about the origin.
4+2cos(Θ+π) = 4+2[cos(Θ)cos(π) - sin(Θ)sin(π)]
=4+2[-cosΘ]
=4-2cosΘ
Source(s): Deep thinking. - 8 years ago
If it's easy, why won't you try to solve it by yourself first before asking for our help, right?
