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geekfromthefutur

  • one year ago

Can someone help me plz its my last question

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  1. geekfromthefutur
    • one year ago
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  2. SolomonZelman
    • one year ago
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    You can almost use the sin law: i.e. Sin(35) /h = Sin(H) /660

  3. SolomonZelman
    • one year ago
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    you just need to find the H, and then apply the sine law to solve for h.

  4. geekfromthefutur
    • one year ago
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    ok so how would i do that i see it right there

  5. SolomonZelman
    • one year ago
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    you know that the angle T=90, O=35 and the only unknown angle is H. There is a rule, that the sum of all angles in a triangle is equal to 180 degrees. In your case that would mean that T + O + H = 180 you know angles T and O, but not the H, so: 90 + 35 + H = 180 (the find H)

  6. geekfromthefutur
    • one year ago
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    OHHH every triangle equals up to 180 degrees

  7. geekfromthefutur
    • one year ago
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    so what we would do is grab 180 and subtract it and do 180 - 90 - 35=

  8. SolomonZelman
    • one year ago
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    not "up to" 180 degrees, but EXACTLY 180 degrees.

  9. SolomonZelman
    • one year ago
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    yes, very nice. H=180-90-35

  10. geekfromthefutur
    • one year ago
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    55

  11. SolomonZelman
    • one year ago
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    Yes, that is correct

  12. SolomonZelman
    • one year ago
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    Now we can use the sine law Sin(35) /h = Sin(H) /660 plugging in our H, Sin(35) /h = Sin(55) /660

  13. geekfromthefutur
    • one year ago
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    Sweet so thats it h is 55

  14. SolomonZelman
    • one year ago
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    no lowercase h is the height. The angle you need ed and found to be 55 is H, uppercase.

  15. geekfromthefutur
    • one year ago
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    Sin(35) /55 = Sin(55) /660

  16. SolomonZelman
    • one year ago
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    no, you didn't find h, you only found H.

  17. geekfromthefutur
    • one year ago
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    o i get it

  18. SolomonZelman
    • one year ago
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    (lowercase H is the angle. you used the rule about the sum of angles in a triangle to obtain H. the h, lowercase, you still need to find.)

  19. SolomonZelman
    • one year ago
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    yes....

  20. SolomonZelman
    • one year ago
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    Sin(35) /h = Sin(55) /660

  21. SolomonZelman
    • one year ago
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    now, use your calculator, and you are done.....

  22. geekfromthefutur
    • one year ago
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    0.819 i got for sin55

  23. geekfromthefutur
    • one year ago
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    1.24 for it divided

  24. SolomonZelman
    • one year ago
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    Sin(35) /h = Sin(55) /660 samewise, h / Sin(35) = 660/ Sin(55) h = 660 * Sin(35) / Sin(55)

  25. SolomonZelman
    • one year ago
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    http://www.wolframalpha.com/input/?i=660+*+Sin%2835%29+%2F+Sin%2855%29

  26. SolomonZelman
    • one year ago
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    (the approximate result, is under "decimal approximation")

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