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anonymous

  • one year ago

What is the length of side BD? ***Diagram attached below***

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    We can use trig ratios, do you know them?

  3. anonymous
    • one year ago
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    |dw:1441221685739:dw| we can just work with the pink triangle here

  4. anonymous
    • one year ago
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    \[\sin \theta = \frac{ opp }{ hyp }~~~~\tan \theta = \frac{ opp }{ adj }~~~~\cos \theta = \frac{ adj }{ hyp }\] these are your trig ratios, which one can we apply here? |dw:1441221868984:dw|

  5. anonymous
    • one year ago
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    cosine?

  6. anonymous
    • one year ago
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    Yes! Now can you set it up?

  7. anonymous
    • one year ago
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    don't worry about being wrong!

  8. anonymous
    • one year ago
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    \[\cos 40°=\frac{ adjacent }{ hypotenuse }=\frac{ 20 }{ x }\]

  9. anonymous
    • one year ago
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    Exactly!

  10. anonymous
    • one year ago
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    Okay thank you so much! I'll try to solve it now!

  11. anonymous
    • one year ago
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    Yw :) have fun!

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