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Qwerty90

Ok so I took this EOC and I want to know ho you solve this kind of problem. (Its in a drawing)

  • one year ago
  • one year ago

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  1. Qwerty90
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    |dw:1335470334534:dw|

    • one year ago
  2. amistre64
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    i cant read the scribble

    • one year ago
  3. amistre64
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    it has to do with the arccos of the angle

    • one year ago
  4. Qwerty90
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    The side length is 176 and the degrees is 72 inside the triangle

    • one year ago
  5. amistre64
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    then cos(72) = s/176 176 cos(72) = s you justs got to remember your definitions on your trigs

    • one year ago
  6. Qwerty90
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    The question is what is the missing side length based on that information

    • one year ago
  7. amistre64
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    i assume it a rt tri?

    • one year ago
  8. amistre64
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    make sure your calc is on degrees and not radians; or simply substitute 72 with, 72pi/180

    • one year ago
  9. Qwerty90
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    its 72 degrees

    • one year ago
  10. amistre64
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    yes, but calculators can be set to read degrees or radians; 72 degress is NOT 72 radians

    • one year ago
  11. amistre64
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    72 degress = 72pi/180 radians

    • one year ago
  12. Qwerty90
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    Ok then that.. how would you solve it? Cause im like they only gave me the angle degrees and a side length and are asking for the other side length

    • one year ago
  13. amistre64
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    the point being: the side length is determined by the cosine function cos = side/hypot cos(72) = s/176 ; multiply both sides by 176 176 cos(72) = s

    • one year ago
  14. Qwerty90
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    so what would it be?

    • one year ago
  15. amistre64
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    do you know how to use a calculator?

    • one year ago
  16. amistre64
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    if not, the wolf will give an approximate value; otherwise, that is the exact value

    • one year ago
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