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Missaa143

  • 3 years ago

Needing help(: PLEASE!

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  1. luckythebest
    • 3 years ago
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    so whats the question sir

  2. Missaa143
    • 3 years ago
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  3. Missaa143
    • 3 years ago
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  4. Missaa143
    • 3 years ago
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    answers to the bottom –70.3 12.4 11.1 6.5

  5. Missaa143
    • 3 years ago
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    answers to the top 3.7 11.5 3.3 4.5

  6. luckythebest
    • 3 years ago
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    Ok. so which trigonometric ratio would mean the ratio of \[\frac{ 9 }{ x }\]

  7. SerikMB
    • 3 years ago
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    use sine theorem

  8. SerikMB
    • 3 years ago
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    note sin(90)=1

  9. Missaa143
    • 3 years ago
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    wait what lol sorry guys im not that great at this :(

  10. luckythebest
    • 3 years ago
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    @Missaa143 at least you are aware that there is something called sin x, cos x etc etc etc ?

  11. Missaa143
    • 3 years ago
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    yes

  12. SerikMB
    • 3 years ago
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    ok, let's consider the first one

  13. SerikMB
    • 3 years ago
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    use pythogorean theorem to find hypothenuse (the longest side of right triangle)

  14. Missaa143
    • 3 years ago
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    okay right

  15. SerikMB
    • 3 years ago
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    hypothenuse^2=5^2+x^2

  16. SerikMB
    • 3 years ago
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    hypothenuse/sin(90)=x/sin(42)

  17. luckythebest
    • 3 years ago
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    @Missaa143 so you know which side divided by which side is cos of any angle?

  18. Missaa143
    • 3 years ago
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    okay gotcha!

  19. SerikMB
    • 3 years ago
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    or you can go directly, x/sin(42)=5/sin(90-42)

  20. Missaa143
    • 3 years ago
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    7/30

  21. Missaa143
    • 3 years ago
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    = 0

  22. luckythebest
    • 3 years ago
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    u can also use Tan of 42 = x / 5.

  23. Missaa143
    • 3 years ago
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    true! ^

  24. Missaa143
    • 3 years ago
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    ill say the first one is 3.3 ?

  25. SerikMB
    • 3 years ago
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    \[\frac{ x }{ \sin(42) }=\frac{ 5 }{ \sin48 }\]

  26. SerikMB
    • 3 years ago
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    no it will be 4.5

  27. Missaa143
    • 3 years ago
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    Ooooo okay i get it!

  28. luckythebest
    • 3 years ago
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    in 2nd one you have hypotenuse = x, and base = 9. So which trig. ratio means base/hypotenuse?

  29. Missaa143
    • 3 years ago
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    i think its D ?

  30. msoemosharro
    • 2 years ago
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    I think it would be easier if you use tan(42)=x/5 => x=5tan(42)

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