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anonymous

  • one year ago

One questions! LAW OF SINES ALGEBRA 2

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    Answer choices: A. 110. 0 degrees B. 153. 9 degrees c. 26.1 degrees D. 70.0 degrees

  3. anonymous
    • one year ago
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    lol very tricky

  4. anonymous
    • one year ago
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    Can you help me?

  5. anonymous
    • one year ago
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    it says use the law of sines to find angle B, but you cannot find angle B yet

  6. anonymous
    • one year ago
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    oh

  7. anonymous
    • one year ago
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    you want to use \[\frac{\sin(B)}{b}=\frac{\sin(A)}{a}\] but you can't because you do not know \(b\)

  8. anonymous
    • one year ago
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    what you really need to do is find angle C first that you can do using the law of sines, since you know 3 out of the four numbers for the ratio needed

  9. anonymous
    • one year ago
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    \[\frac{sin(C)}{19}=\frac{\sin(40)}{13}\] is where you have 3 out of the four numbers

  10. anonymous
    • one year ago
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    so \[\sin(C)=\frac{19\times \sin(40)}{13}\] making \[C=\sin^{-1}\left(\frac{19\times \sin(40)}{13}\right)\]

  11. anonymous
    • one year ago
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    obviously you need so use some kind of calculator for this i can show you what i use

  12. anonymous
    • one year ago
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    okay

  13. anonymous
    • one year ago
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    http://www.wolframalpha.com/input/?i=arcsin%2819sin%2840%29%2F13%29

  14. anonymous
    • one year ago
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    that is not your final answer of course, that is just C

  15. anonymous
    • one year ago
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    okay

  16. anonymous
    • one year ago
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    once you have \(C=69.69^\circ\) you can find \(A\)

  17. anonymous
    • one year ago
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    you good from there?

  18. anonymous
    • one year ago
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    Okay, how would I write the equation?

  19. anonymous
    • one year ago
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    Not quite..

  20. anonymous
    • one year ago
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    @satellite73

  21. anonymous
    • one year ago
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    @triciaal pease help!

  22. anonymous
    • one year ago
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    will you help me? @triciaal

  23. misty1212
    • one year ago
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    you have two angles right?

  24. misty1212
    • one year ago
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    the total is 180

  25. misty1212
    • one year ago
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    \[180-40-69.96\]

  26. misty1212
    • one year ago
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    oops \[180-40-69.69\]

  27. triciaal
    • one year ago
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    do you see that Angle C is 70?

  28. triciaal
    • one year ago
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    Angles in a triangle add up to 180 40 + B + 70 = 180 solve for B

  29. anonymous
    • one year ago
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    I tried to tag him but hedidn't come back

  30. anonymous
    • one year ago
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    Yes, I see that angle C is 70

  31. anonymous
    • one year ago
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    70

  32. triciaal
    • one year ago
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    sorry I saw that after 2 tags together

  33. anonymous
    • one year ago
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    is that all? It's just that equation?

  34. triciaal
    • one year ago
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    that's what I got

  35. anonymous
    • one year ago
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    okay, thank you for your help!

  36. triciaal
    • one year ago
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    you are welcome

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