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anonymous

  • one year ago

Two triangles can be formed with the given information. Use the Law of Sines to solve the triangles. B = 46°, a = 12, b = 11 A = 38.3°, C = 95.7°, c = 8; A = 141.7°, C = 84.3°, c = 8 A = 51.7°, C = 82.3°, c = 8; A = 128.3°, C = 5.7°, c = 8 A = 38.3°, C = 95.7°, c = 15.2; A = 141.7°, C = 84.3°, c = 15.2 A = 51.7°, C = 82.3°, c = 15.2; A = 128.3°, C = 5.7°, c = 1.5 @ganeshie8 @dan815 @pooja195 @nincompoop @hero @wio @luigi0210 @.sam. @usukidoll

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  1. butterflydreamer
    • one year ago
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    do you know your sine rule? :)

  2. anonymous
    • one year ago
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    no i dont know anything

  3. anonymous
    • one year ago
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    do u know the answer? @butterflydreamer

  4. butterflydreamer
    • one year ago
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    |dw:1436242601937:dw|

  5. butterflydreamer
    • one year ago
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    lmaooo i'm not here to give you a direct answer. It's against CoC... :)

  6. anonymous
    • one year ago
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    well i dont want the answer but i want the step by step

  7. anonymous
    • one year ago
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    cuz i have no clue how to do this

  8. butterflydreamer
    • one year ago
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    that's fine :) Anyway, so the sine rule basically is this: \[\frac{ a }{ sinA } = \frac{ b }{ sinB} = \frac{ c }{ sinC} \] and you can even flip it around: \[\frac{ sinA }{ a } = \frac{ sinB }{ b}= \frac{ sinC }{ c }\] Now you want to draw up a triangle and label the information give to you which is: B = 46 , a = 12, b = 11 so, |dw:1436242931550:dw| Firstly, we want to find angle A

  9. anonymous
    • one year ago
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    okay so what do we do next?

  10. butterflydreamer
    • one year ago
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    Using the sine rule we can find angle A like this : \[\frac{ sinA }{ a } = \frac{ sinB }{ b } \rightarrow \frac{ sinA }{ 12 } = \frac{ \sin46 }{ 11 }\]

  11. butterflydreamer
    • one year ago
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    |dw:1436243178342:dw|

  12. butterflydreamer
    • one year ago
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    now to find A we go: |dw:1436243370517:dw|

  13. anonymous
    • one year ago
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    i got an error sign @butterflydreamer

  14. butterflydreamer
    • one year ago
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    did you plug it into the calculator correctly? Try again Lol. I plugged it into my calculator and got a number so you should get one too :)

  15. anonymous
    • one year ago
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    i got none of my option? can u tell me what it is @butterflydreamer

  16. anonymous
    • one year ago
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    please help @butterflydreamer

  17. anonymous
    • one year ago
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    i give up @butterflydreamer can u please just tell me :)

  18. anonymous
    • one year ago
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    please @butterflydreamer

  19. butterflydreamer
    • one year ago
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    http://prntscr.com/7pq08q round that number to 1 decimal place

  20. anonymous
    • one year ago
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    okay thats 5.7 but that only A it only narrows our options to two

  21. anonymous
    • one year ago
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    51.7

  22. anonymous
    • one year ago
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    A = 51.7°, C = 82.3°, c = 8; A = 128.3°, C = 5.7°, c = 8 A = 51.7°, C = 82.3°, c = 15.2; A = 128.3°, C = 5.7°, c = 1.5 so which one of these are the answers? @butterflydreamer

  23. butterflydreamer
    • one year ago
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    yeeep so A = 51.7 Now use the sine rule and follow a similar method to solve for c and C

  24. anonymous
    • one year ago
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    so can u help me solve them please :)

  25. butterflydreamer
    • one year ago
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    |dw:1436244696917:dw| Find angle C by using the fact that the angle sum (all 3 angles in a triangle) = 180. So we have two angles right? A = 51.7 , B = 46. Therefore C = 180 - 51.7 - 46 = ?

  26. anonymous
    • one year ago
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    82.3

  27. anonymous
    • one year ago
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    i need help finding little c

  28. butterflydreamer
    • one year ago
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    yeep C = 82.3 Now to find the length of c, we need to use the sine rule again: |dw:1436244903292:dw| |dw:1436244943797:dw|