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Qwerty90

  • 4 years ago

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

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  1. Qwerty90
    • 4 years ago
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    |dw:1335470334534:dw|

  2. amistre64
    • 4 years ago
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    i cant read the scribble

  3. amistre64
    • 4 years ago
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    it has to do with the arccos of the angle

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

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

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

  7. amistre64
    • 4 years ago
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    i assume it a rt tri?

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

  9. Qwerty90
    • 4 years ago
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    its 72 degrees

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

  11. amistre64
    • 4 years ago
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    72 degress = 72pi/180 radians

  12. Qwerty90
    • 4 years ago
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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

  13. amistre64
    • 4 years ago
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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

  14. Qwerty90
    • 4 years ago
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    so what would it be?

  15. amistre64
    • 4 years ago
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    do you know how to use a calculator?

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

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