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Emily778 Group Title

Write the ratios for sin A and cos A. The triangle is not drawn to scale.

  • one year ago
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  1. Emily778 Group Title
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  6. satellite73 Group Title
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    using the old "opposite over hypotenuse" you get \[\sin(A)=\frac{3}{5}\]

    • one year ago
  7. satellite73 Group Title
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    and using "adjacent over hypotenuse" you get \[\cos(A)=\frac{4}{5}\]

    • one year ago
  8. Emily778 Group Title
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    10. Use a trigonometric ratio to find the value of x. Round your answer to the nearest tenth. The triangle is not drawn to scale. (2 points)

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  9. Emily778 Group Title
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    Can you please show me step by step on how to do this?

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  10. satellite73 Group Title
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    yes

    • one year ago
  11. satellite73 Group Title
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    tangent in a right triangle is "opposite over adjacent" so you have \[\tan(20)=\frac{9}{x}\]

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  12. Emily778 Group Title
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    Do I have to put tan on my work?

    • one year ago
  13. satellite73 Group Title
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    solve the ratio for \(x\) and get \[x=\frac{9}{\tan(20)}\] to get the number you need a calculator

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  14. satellite73 Group Title
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    yes you need tangent for this one since you have the opposite side, and you want the adjacent side

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  15. satellite73 Group Title
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    to the nearest tenth it looks like \(24.7\) http://www.wolframalpha.com/input/?i=9%2Ftan%2820%29

    • one year ago
  16. Emily778 Group Title
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    So, do I do 9/20?

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  17. satellite73 Group Title
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    talk about "not drawn to scale"!!

    • one year ago
  18. satellite73 Group Title
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    oh no, not \(\frac{9}{20}\) it is \(x=\frac{9}{\tan(20)}\) to find that number you need a calculator

    • one year ago
  19. satellite73 Group Title
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    in english "nine over the tangent of twenty"

    • one year ago
  20. Emily778 Group Title
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    I got 24.72.

    • one year ago
  21. satellite73 Group Title
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    me too

    • one year ago
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