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babydoll332

  • 2 years ago

Solve for x. Round your answer to 2 decimal places.

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  1. babydoll332
    • 2 years ago
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  2. babydoll332
    • 2 years ago
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    21.71 correct?

  3. phi
    • 2 years ago
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    how?

  4. ganeshie8
    • 2 years ago
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    looks u have used cos, u must use sin soh-cah

  5. babydoll332
    • 2 years ago
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    so, i tried again and got 14.90

  6. phi
    • 2 years ago
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    how? what steps are you taking?

  7. babydoll332
    • 2 years ago
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    sin opp/hyp

  8. phi
    • 2 years ago
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    that is a good start |dw:1350512679019:dw|

  9. phi
    • 2 years ago
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    can you fill in the numbers in sin( angle) = opp/hyp

  10. babydoll332
    • 2 years ago
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    the angles yess

  11. babydoll332
    • 2 years ago
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    then do that weird formula with A=(c+b)...

  12. babydoll332
    • 2 years ago
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    which now gave me 32.19

  13. phi
    • 2 years ago
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    what did you do?

  14. babydoll332
    • 2 years ago
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    sin(θ) = Opposite / Hypotenuse

  15. phi
    • 2 years ago
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    yes, but what numbers?

  16. babydoll332
    • 2 years ago
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    idk im lost idk my steps im getting it wrong its confusing me now

  17. phi
    • 2 years ago
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    Look at the picture. The angle is 34 degrees, right? I would replace θ with 34 in your equation sin(θ) = Opposite / Hypotenuse which side is opposite (look at my picture) how long is it?

  18. babydoll332
    • 2 years ago
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    90?

  19. phi
    • 2 years ago
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    90 is an angle (the right angle) the sides are the lines. I drew an arrow pointing at the line opposite the 34 degree angle

  20. babydoll332
    • 2 years ago
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    oh ok so 34/ hyp

  21. babydoll332
    • 2 years ago
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    couldnt i do pythergerium therom?

  22. phi
    • 2 years ago
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    34 is an angle. remember that you want the legs (the sides of the triangle)

  23. phi
    • 2 years ago
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    and we need to use trig here. pythagoras needs 2 sides (and no angles). But here we know 1 side and 1 angle. so we use trig. what is the length of the side opposite the 34 deg angle. look at the picture.

  24. babydoll332
    • 2 years ago
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    18

  25. phi
    • 2 years ago
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    yes. you replace opposite in sin(θ) = Opposite / Hypotenuse with 18. you replace θ with the angle 34 can you do that?

  26. babydoll332
    • 2 years ago
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    18/34

  27. phi
    • 2 years ago
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    pay attention: 34 is an angle. sin(θ) = Opposite / Hypotenuse means that the sin of an angle is opposite leg/ hypotenuse sin(34)= 18/x x because the picture calls the hypotenuse x now you need to solve for x can you do that ?

  28. babydoll332
    • 2 years ago
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    its 32.1 ! :DDDD

  29. phi
    • 2 years ago
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    just for info: If you are given 1+a and are told: replace a with 2, you would write 1+2 if your are given a/b and are told replace b with 3, you would write a/3 you need to do this "replace" to use these equations.

  30. babydoll332
    • 2 years ago
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    i got it its 32.1 !! :)

  31. babydoll332
    • 2 years ago
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    thank you so much for spending sooo much time on this with me !!!!

  32. phi
    • 2 years ago
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    how did you do it (it's right, BUT Round your answer to 2 decimal places.) but how did you do it?

  33. babydoll332
    • 2 years ago
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    32.19 i just re possisioned the sin(34)= 18/x

  34. babydoll332
    • 2 years ago
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    pluged it into the cal

  35. babydoll332
    • 2 years ago
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    to find x

  36. phi
    • 2 years ago
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    yes. You got it.

  37. phi
    • 2 years ago
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    if you have time, this video http://www.khanacademy.org/math/trigonometry/v/basic-trigonometry might be helpful. It helps me to see someone do the steps.

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