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rebeccaskell94 Group Title

@SmoothMath I need your help D: Use △DEF, shown below, to answer the question that follows. http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/pool_Geom_3641_0402_02/0402_G2_Q3.gif What is the value of x rounded to the nearest hundredth?

  • 2 years ago
  • 2 years ago

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  1. SmoothMath Group Title
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    What have you tried so far?

    • 2 years ago
  2. mathslover Group Title
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    |dw:1341504473383:dw|

    • 2 years ago
  3. SmoothMath Group Title
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    This is very similar to the kind of problem I taught you before.

    • 2 years ago
  4. rebeccaskell94 Group Title
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    Well I looked at the triangle and saw that like EF is opposite and DE is adjacent sooo I use tan?

    • 2 years ago
  5. SmoothMath Group Title
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    Very good. Keep going. Use tangent to set up the equation.

    • 2 years ago
  6. mathslover Group Title
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    soa cah toa .. tan (theta)= opposite / adjacent .. good u r going right best of luck

    • 2 years ago
  7. SmoothMath Group Title
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    soh cah toa*

    • 2 years ago
  8. ivandelgado6 Group Title
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    SmoothMath help me

    • 2 years ago
  9. SmoothMath Group Title
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    Sorry, Becca is cuter.

    • 2 years ago
  10. rebeccaskell94 Group Title
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    :3> xD thanks Okay, um Tan(45) = x/55 ?

    • 2 years ago
  11. rebeccaskell94 Group Title
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    x= 2,475

    • 2 years ago
  12. SmoothMath Group Title
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    Looks good. Solve for x and then round to the nearest hundredth like they ask.

    • 2 years ago
  13. SmoothMath Group Title
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    Oh wait. One problem with your equation. The angle isn't 45.

    • 2 years ago
  14. rebeccaskell94 Group Title
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    lol derp. 49 Tan(49) = x/55 x= 2,695

    • 2 years ago
  15. rebeccaskell94 Group Title
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    or just 2700

    • 2 years ago
  16. SmoothMath Group Title
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    I don't know what you did, but 2,695 is super super off.

    • 2 years ago
  17. rebeccaskell94 Group Title
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    D: I thought it was 49 x 55 to find out x to then divide it and then make it like...right =2695/55 = 49

    • 2 years ago
  18. SmoothMath Group Title
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    TANGENT of 49... super different from 49. Use your calculator to find out what tan(49) is. Make sure you're in degrees and not radians.

    • 2 years ago
  19. SmoothMath Group Title
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    tan(49) = x/55 Just solve for x, then let your calculator do the trig function for you.

    • 2 years ago
  20. rebeccaskell94 Group Title
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    my calculator doesn't do anything but x/55

    • 2 years ago
  21. SmoothMath Group Title
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    It really doesn't have sin cos tan buttons on it? You'll need to use a different calculator then, or else use google or alpha.

    • 2 years ago
  22. rebeccaskell94 Group Title
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    This is what I use http://web2.0calc.com/

    • 2 years ago
  23. rebeccaskell94 Group Title
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    Or is it just the 1.15 thing

    • 2 years ago
  24. rebeccaskell94 Group Title
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    ohhh like tan(49) = 1.15/55 ?

    • 2 years ago
  25. SmoothMath Group Title
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    Far left, below pi, you'll see the buttons sin, cos, and tan. Those are your trig functions. To do this one, click tan, then 49, then ). Should look like this: I've boxed the trig function buttons in blue and the way to switch between degrees and radian modes in green.

    • 2 years ago
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  26. SmoothMath Group Title
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    Becca, please don't forget how to do simple algebra. tan(49) = x/55 How do you solve for x?

    • 2 years ago
  27. rebeccaskell94 Group Title
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    49/1 • x/55? ... My brain...it's dying. :(

    • 2 years ago
  28. SmoothMath Group Title
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    multiply both sides by 55. -_-

    • 2 years ago
  29. rebeccaskell94 Group Title
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    -__- dollface 49 • 55 and x/55 • 55?

    • 2 years ago
  30. SmoothMath Group Title
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    not 49*55. tan(49)*55

    • 2 years ago
  31. SmoothMath Group Title
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    and what is x/55 * 55?

    • 2 years ago
  32. rebeccaskell94 Group Title
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    1?

    • 2 years ago
  33. SmoothMath Group Title
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    oh my goodness. Becca, can you solve this equation for me? 4 = x/2

    • 2 years ago
  34. rebeccaskell94 Group Title
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    8

    • 2 years ago
  35. SmoothMath Group Title
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    Same dang thing here. tan(49) = x/55

    • 2 years ago
  36. Wolfboy Group Title
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    55*49.........

    • 2 years ago
  37. SmoothMath Group Title
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    Wrong, wolfboy.

    • 2 years ago
  38. rebeccaskell94 Group Title
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    Its not just 55*49 D: he said it's tan(49) :(

    • 2 years ago
  39. SmoothMath Group Title
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    55* tan(49)

    • 2 years ago
  40. Wolfboy Group Title
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    I. Thought sooo......hmmmmmm

    • 2 years ago
  41. Wolfboy Group Title
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    Sooo we need the formula for tan or a couculater

    • 2 years ago
  42. rebeccaskell94 Group Title
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    63.27?

    • 2 years ago
  43. SmoothMath Group Title
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    Yes. Let me just show you the last 2 steps. You got as far as tan(49) = x/55 multiply both sides by 55. That's basic algebra, solving for x. 55*tan(49) = x tan of 49, when you put in your calculator is 1.15036841 and 55*(1.15036841) = 63.2702625 then, of course you round to the nearest hundredth.

    • 2 years ago
  44. rebeccaskell94 Group Title
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    Thank you dollface :D Sorry if I frustrated you :c

    • 2 years ago
  45. SmoothMath Group Title
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    You didn't, cutesie buttons. I'm happy to help. =)

    • 2 years ago
  46. rebeccaskell94 Group Title
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    Yay :D

    • 2 years ago
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