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anonymous

  • one year ago

Exact measures

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    sin13=5/c, 5*sin13, c=5*sin13

  3. Nnesha
    • one year ago
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    hmmm to find 3rd side you should know one angle and one side sin = opposite over hyp right ?

  4. anonymous
    • one year ago
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    but the hypotenuse isn't known in this case

  5. Nnesha
    • one year ago
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    right i want u to take a few sec and think about is it sin 13 = 5 /c correct ? sin = opposite over hyp and we are looking at angle B which is 13

  6. Nnesha
    • one year ago
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    given is a which is 5

  7. anonymous
    • one year ago
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    no it's not correct! :) I was looking at angle A

  8. anonymous
    • one year ago
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    so we can use tan77=b/5

  9. Nnesha
    • one year ago
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    well sin B = opposite over hyp but the opposite of angle B isn't given

  10. Nnesha
    • one year ago
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    |dw:1443995559282:dw|

  11. anonymous
    • one year ago
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    but we can find out what angle b is.. it's 77 degrees

  12. Nnesha
    • one year ago
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    |dw:1443995567775:dw| we don't konw what c equal to and we don't know what is B so you can't use sin for angle B

  13. Jhannybean
    • one year ago
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    \[\angle A = 90^\circ - \angle B\]

  14. Nnesha
    • one year ago
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    yes that's correct tan 77 = b/5

  15. Nnesha
    • one year ago
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    no wait a sec looking at wrong angle

  16. Nnesha
    • one year ago
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    nvm that's correct tan B = b/5

  17. anonymous
    • one year ago
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    so should i write 5tan(77)?

  18. anonymous
    • one year ago
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    for the length of b

  19. Nnesha
    • one year ago
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    looks good

  20. anonymous
    • one year ago
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    and for c we can do sin(13)=5/c

  21. anonymous
    • one year ago
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    I got 5/sin13

  22. Nnesha
    • one year ago
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    \(\huge\color{green}{\checkmark}\)

  23. anonymous
    • one year ago
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    the last one was incorrect :)

  24. Nnesha
    • one year ago
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    what which one ?? :o

  25. anonymous
    • one year ago
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    for length of c

  26. Nnesha
    • one year ago
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    well 77+90 =167 subtract from 180 180-167 =13 |dw:1443996138575:dw| looks right

  27. Nnesha
    • one year ago
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    or maybe they want u to use given angle which si 77 to finfd length c

  28. anonymous
    • one year ago
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    I ended up getting 5/cos(77)

  29. Nnesha
    • one year ago
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    yes right

  30. Nnesha
    • one year ago
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    did you put parentheses for 5/sin(13 ) ?

  31. anonymous
    • one year ago
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    5/cos(77) was correct :) thank you lots!

  32. Nnesha
    • one year ago
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    hmm note for next time only use given angle

  33. Nnesha
    • one year ago
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    the*

  34. anonymous
    • one year ago
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    Got ya :) It's something I need to review!

  35. Nnesha
    • one year ago
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    yes right and t trust urself you're really good at math just need little review good lukc o^_^o

  36. Nnesha
    • one year ago
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    luck**

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