A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

In △JKL, solve for x. Answer Choices: A) 66.73 B) 74.89 C) 15.44 D) 38.16

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1 Attachment
  2. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[\rm sin \rm \theta = \frac{ opposite }{ hypotenuse }~~~~ \cos \theta = \frac{ adjacent }{ hypotenuse } ~~\tan \theta = \frac{ opposite }{ adjacent }\]

  3. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1440790508463:dw|

  4. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    which function you should use to find x ?

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    The Cos function?

  6. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    which side is adjacent of 27 degree angle ?

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Side KL with the 34 in the middle

  8. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    hmm that would be the opposite side adjacent side would the touch |dw:1440790695818:dw| the angle now look at 27 degree angle

  9. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    kl is adjacent of theta it's a opposite side of 27 degree angle not adj

  10. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Oh, yes. I forgot about the Theta,

  11. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    to find length of x you should know one angle and one side so we would use sin function

  12. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1440790850611:dw|

  13. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Wait, how'd you get the Adjacent onto the opposite side? Is it being flipped because of the 27 degrees?

  14. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    different angles different sides

  15. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1440791024957:dw|

  16. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    JK is n't opposite side of 27 angle

  17. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yep right solve for x

  18. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Okay, just a second :)

  19. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1440791173523:dw|

  20. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Then my answer was: 74.906

  21. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    looks good

  22. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Are you sure everything looks right?

  23. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i know what u r talking about when you put sin(27 degree) into the calculator you will get .45399 so you should round it .45399=.4540

  24. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    |dw:1440791354591:dw|

  25. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    now divide 34/.4540

  26. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Yes, my answer is: 74.889, which will then round to 74.89. Which is B. :)

  27. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes :=)

  28. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Could you possibly help me on another question?

  29. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i'll try

  30. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Okay, would you like it in a different post or here is fine?

  31. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    doesn't matter :=) post that here i'm okay with it

  32. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Find the value of the cot 10° using your calculator. Answer choices: A) 0.176 B) 5.671 C) 0.648 D) 1.542

  33. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay use calculator then :D

  34. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    How would I type that in though?

  35. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    what is the reciprocal of cot ?

  36. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Hmm, I'm sorry haha, I don't understand this question at all, it wasn't in the lesson I got my notes from..

  37. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    alright then write these down in ur notebook \[\large\rm sin \theta = \frac{ 1 }{ \csc \theta }~~~\cos \theta=\frac{ 1 }{ \sec \theta}~~~\tan \theta=\frac{ 1 }{ \cot \theta }=\frac{ \sin \theta}{ \cos \theta}\]

  38. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    tan =1/cot or you can say it's equal to sin/cos

  39. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    csc , sec and tan are reciprocal of sin ,cos and cot

  40. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    csc = 1/sin sin =1/csc

  41. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so if tan = sin /cos cot = ?

  42. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1?

  43. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    what is the reciprocal of sin/cos ?

  44. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    tan.

  45. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay so cot =1/tan \[\huge\rm tan = \frac{ 1 }{ \cot }~~and~~ \cot =\frac{ 1 }{ \tan}\]

  46. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    if tan equal sin/cos then replace tan with sin /cos

  47. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay so cot =1/tan \[\huge\rm \cot =\frac{ 1 }{ \color{red}{\tan}}\]\[\cot = \frac{ 1 }{ \color{Red}{\frac{ \sin }{ \cos }} }\]

  48. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Okay, so you're basically switching them around? With the originally formula.

  49. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    just remember tan =sin/cos

  50. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes right

  51. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    now cot = ??

  52. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[\huge\rm \frac{ 1 }{ \frac{ \sin }{ \cos } } = ?\]we can change division to multiplication right

  53. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I'm so confused, I'm understanding pieces but then I'm not.. As I said before, I've never seen this type of question or even demonstration in a lesson I've had.

  54. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    okay let's change that to simple algebra \[\huge\rm \frac{ 1 }{ \frac{ a }{ b } }\] how would you simplify it ?

  55. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Multiplying?

  56. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    multiply the `numerator` by the `reciprocal` of the bottom fraction \[\huge\rm \frac{ 1 }{ \frac{ a }{ b } }=1 \times \frac{b}{a}\]

  57. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Why did you change b as the numerator and a as the denominator?

  58. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    ohh so you don't know the definition of reciprocal reciprocal means `flip` the fraction reciprocal of 2/3 is 3/2

  59. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so reciprocal of a/b would be b/a so to change division to multiplication you should always multiply the numerator with the `reciprocal` of the bottom

  60. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Oh okay, I understand.

  61. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    so what is reciprocal of sin/cos ?

  62. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Well, you said reciprocal means to flip the fraction, so would it be cos/sin? Or would it be csc/sec?

  63. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    no just cos /sin

  64. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    tan = sin/cos and cot is `reciprocal` of tan then cot would be cos/sin

  65. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    \[\huge\rm cot \theta= \frac{ \cot \theta }{ \sin \theta }\]\[\huge\rm cot(10^o)= \frac{ \cos (10)^o }{ \sin(10^o) }\]

  66. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Okay, I understand what's going on now. So you'd fill in the 10 degrees with the cot function?

  67. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    another example \[\huge\rm \cot (a) =\frac{ \cos(a) }{ \sin(a)}\]

  68. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes you have to find cot (10 deg) which is not in the calcualtor so you should put cos(10)/sin(10)

  69. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    cot(10) is same as cos(10)/(sin 10)

  70. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    It'll give me 5.671. Which is B. I'll have to review those functions more because it's still confusing but I can understand what you're saying. I'll just need to do some more practice.

  71. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    yes practice ,practice and practice you will become trig expert!

  72. Nnesha
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    let me know if you din't understand anything on this post i'll try my best to explain! :=) good luck!

  73. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.