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MaryJSmith

What is the length of the portion BC of the cloth?

  • 2 years ago
  • 2 years ago

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  1. MaryJSmith
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    • 2 years ago
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  2. MaryJSmith
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    8cos35 degrees 8sin 35 degrees sin35 degrees/8 cos35 degrees/8

    • 2 years ago
  3. saifoo.khan
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    use sin ratio.

    • 2 years ago
  4. MaryJSmith
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    idk what that is..

    • 2 years ago
  5. saifoo.khan
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    \[\sin \theta = \frac{opposite}{hypotenuse}\]

    • 2 years ago
  6. MaryJSmith
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    idk what all that means..

    • 2 years ago
  7. saifoo.khan
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    |dw:1333128731997:dw|Dont sleep in class. ;)

    • 2 years ago
  8. MaryJSmith
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    I'm home schooled.. I can't sleep in class , haha . I just don't understand this stuff & I have HORRIBLE memory :) Ha !

    • 2 years ago
  9. saifoo.khan
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    lol. Ok. this is easy i can teach you. :)

    • 2 years ago
  10. MaryJSmith
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    So what is it exactly that I'm supposed to do here ??

    • 2 years ago
  11. saifoo.khan
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    There are three basic ratios. Sin ratio, cos ratio, tan ratio. you have to remember these.. Not them down somewhere.

    • 2 years ago
  12. MaryJSmith
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    okay..

    • 2 years ago
  13. saifoo.khan
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    |dw:1333128936512:dw|

    • 2 years ago
  14. saifoo.khan
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    |dw:1333129034555:dw|

    • 2 years ago
  15. saifoo.khan
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    Now these are the three sides. now it depends upon the question which two ratio you have to use.. you have to judge it by yourself.

    • 2 years ago
  16. saifoo.khan
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    Now in your question.. you are given hypotenuse and you have to find the opposite side.. so u will be using sin ratio.

    • 2 years ago
  17. MaryJSmith
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    i still don't get it though . like , what #'s do i plug in & where ?? it's so confusing to me!!

    • 2 years ago
  18. inkyvoyd
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    Ok, so the basic idea is that if you have a right angle, and You know the second angle, you know the ratio of the two sides. Now all of the trig functions essentially take in an angle, and out put a ratio.

    • 2 years ago
  19. MaryJSmith
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    i'm still confused :(

    • 2 years ago
  20. inkyvoyd
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    Do you want to talk it over in chat?

    • 2 years ago
  21. MaryJSmith
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    No.. too overwhelming . Just mssg me .

    • 2 years ago
  22. inkyvoyd
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    Can we do something like tiny chat? Messaging is too slow. If you have a skype, you could chat with me there (or create an anonymous one)

    • 2 years ago
  23. MaryJSmith
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    i cant , im also takin a test & i can only be on here & my test (im bein supervised)

    • 2 years ago
  24. inkyvoyd
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    Wait, you are allowed to go here and on your test?

    • 2 years ago
  25. MaryJSmith
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    Yes

    • 2 years ago
  26. inkyvoyd
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    Alright, Trigonometry is like an extension of triangle congruence.

    • 2 years ago
  27. inkyvoyd
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    *triangle similarity

    • 2 years ago
  28. inkyvoyd
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    For triangle similarity, we can prove that two triangles are similar given certain info (SAS, AA, SSS, etc). But if they are similar, then how can we figure out the side lengths they have?

    • 2 years ago
  29. MaryJSmith
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    idk..

    • 2 years ago
  30. inkyvoyd
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    The answer is that we use trigonometry. The basic idea of trig is that in a right triangle where we know all the degree measures, we can determine the ratio between the sides.

    • 2 years ago
  31. inkyvoyd
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    Tell me if you are following what I'm saying, ok

    • 2 years ago
  32. MaryJSmith
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    I'm not.. haha sorry . I am so confused !! I'm a visual/audio learner..

    • 2 years ago
  33. inkyvoyd
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    ok, who is supervising you? I have file that will help you a lot, but it's for a geometry software called "GeoGebra"

    • 2 years ago
  34. MaryJSmith
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    i have geogebra

    • 2 years ago
  35. inkyvoyd
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    Alright, take a look at this file. Tell me if it helps.

    • 2 years ago
  36. MaryJSmith
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    I'm just gonna guess cos theres like 4 or 5 probs like this & I have 15 mins to finish 20 more problems !!!!!

    • 2 years ago
  37. inkyvoyd
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    sigh. if they are typable, put them into wolfram alpha dot com or something,

    • 2 years ago
  38. Mikellaalbertson
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    So what's the answer

    • 11 months ago
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