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anonymous

  • 5 years ago

If the cos(A) = 2/3 and the angle A is between 180 and 360 degrees, including 180 and 360 degrees, determine the sin(A) and the tan(A). Give a detailed explanation.

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  1. anonymous
    • 5 years ago
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    Hi

  2. anonymous
    • 5 years ago
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    cosine is adjacent and hypotenues

  3. anonymous
    • 5 years ago
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    so right of the bat adjacent is 2 and hypotenuse is 3

  4. anonymous
    • 5 years ago
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    using pythagorean theorem, the third side is sqrt(5) ooo, ugly

  5. anonymous
    • 5 years ago
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    yes, it is

  6. anonymous
    • 5 years ago
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    now find the sine and tangent; sine=opposite/hypotenuse=sqrt(5)/3 tangent=opposite/adjacent=sqrt(5)/2

  7. anonymous
    • 5 years ago
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    give or take; I didn't really consider the degree constraints yet

  8. anonymous
    • 5 years ago
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    ok

  9. anonymous
    • 5 years ago
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    I am not good with geometry at all

  10. anonymous
    • 5 years ago
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    What would I do next?

  11. anonymous
    • 5 years ago
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    Smartone are you here?

  12. anonymous
    • 5 years ago
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    well, those are the numbers, and since the constraint is 180 to 360, I would make them all negative

  13. anonymous
    • 5 years ago
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    ok, thanks, if I attach a file, would you be able to see what is in it?

  14. anonymous
    • 5 years ago
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    Sin is negative between 180 and 360 degrees Tan is positive between 180 and 270 and negative between 270 and 360

  15. anonymous
    • 5 years ago
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    ok, thanks

  16. anonymous
    • 5 years ago
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    I am confused about this problem.

  17. anonymous
    • 5 years ago
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    If cos = 2/3 then cosine is only positive between 270 and 360

  18. anonymous
    • 5 years ago
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    So make sin negative and tan negative with the answers above.

  19. anonymous
    • 5 years ago
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    but I do not have the answer, I do not know how to get it

  20. anonymous
    • 5 years ago
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    Are you all with me?

  21. anonymous
    • 5 years ago
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    darn guess noy

  22. anonymous
    • 5 years ago
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    not*

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spraguer (Moderator)
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