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a1234

  • one year ago

Can someone please explain how the answer is 143?

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  1. zzr0ck3r
    • one year ago
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    This is very meta.

  2. a1234
    • one year ago
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  3. amistre64
    • one year ago
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    h is 90 degrees, and we can trig the rest

  4. a1234
    • one year ago
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    How do we trig?

  5. amistre64
    • one year ago
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    by some thrm, arc(HK) is twice angleG

  6. amistre64
    • one year ago
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    we have a right triangle, and know leg lengths ....

  7. amistre64
    • one year ago
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    |dw:1432872894311:dw| trig to find \(\alpha\) and \(\beta \)

  8. amistre64
    • one year ago
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    what trig function uses just the legs?

  9. a1234
    • one year ago
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    tan

  10. a1234
    • one year ago
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    so tanx = 12/4

  11. amistre64
    • one year ago
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    then tan it tan(a) = 12/4 inverse for the angle

  12. a1234
    • one year ago
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    Got it! Thanks very much!

  13. amistre64
    • one year ago
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    yep

  14. amistre64
    • one year ago
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    the required arc is therefore \(2\alpha\) :)

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