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aussy123

  • one year ago

CAN SOMEONE PLEASE HELP ME!! Convert x 2 + y 2 = 8 to a polar equation. r = 4 r² = 8 r² = 64

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  1. galacticwavesXX
    • one year ago
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    is r the given?

  2. aussy123
    • one year ago
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    yes r is 8 its based off the formula x^2+y^2=8

  3. aussy123
    • one year ago
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    i think its the last one r^2=64 r=8

  4. galacticwavesXX
    • one year ago
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    x^2+y^2=8 ==> r^2=8

  5. galacticwavesXX
    • one year ago
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    how can r^2 be both 8 and 64?

  6. galacticwavesXX
    • one year ago
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    r^2=8

  7. aussy123
    • one year ago
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    |dw:1365741494311:dw|

  8. galacticwavesXX
    • one year ago
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    r^3=64

  9. aussy123
    • one year ago
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    8^2=64

  10. galacticwavesXX
    • one year ago
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    no but when you are converting to a polar equation \[r=\sqrt{x^2+y^2}\]

  11. galacticwavesXX
    • one year ago
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    therefore \[r^2=x^2+y^2\]

  12. galacticwavesXX
    • one year ago
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    so you are replacing the \[x^2+y^2 \]

  13. galacticwavesXX
    • one year ago
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    with \[r^2\]

  14. aussy123
    • one year ago
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    r^2=8

  15. aussy123
    • one year ago
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    ?

  16. galacticwavesXX
    • one year ago
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    yes you are converting from a rectangular equation to a polar equation

  17. galacticwavesXX
    • one year ago
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    that's what is stated in the question to do

  18. aussy123
    • one year ago
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    thx

  19. galacticwavesXX
    • one year ago
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    but if you teacher wants r itself then r is \[r=2\sqrt{2}\]

  20. galacticwavesXX
    • one year ago
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    r cant be 4 because you have are taking the root of 8 not halving it

  21. aussy123
    • one year ago
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    ok

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