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anonymous

  • one year ago

Find x.

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    |dw:1441322195098:dw|

  3. anonymous
    • one year ago
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    I'm kidding lol. To find this you need to figure out which one you're going to use. Sin, cos or tan?

  4. anonymous
    • one year ago
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    Cos?

  5. anonymous
    • one year ago
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    Nope. Remember cos is CAH and that would be the adjacent and hypotenuse. Which sides do they give you here?

  6. anonymous
    • one year ago
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    Sin?

  7. anonymous
    • one year ago
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    Yup. They give you the opposite and the hypotenuse here. Which is SOH So the equation for this would be sin x = opposite/hypotenuse.

  8. anonymous
    • one year ago
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    Would you like to identify the opposite and the hypotenuse?

  9. anonymous
    • one year ago
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    x/12.1?

  10. anonymous
    • one year ago
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    Yup. x would be the opposite and 12.1 would be the hypotenuse. So now we figure out sin. Insert 36 into the calculator and press sin. You should get 0.587. So now we have 0.587 = x/12.1 To solve this you need to multiply 12.1 on both sides to separate the x. You should get 7.11. Which is the missing side. x = 7.11

  11. anonymous
    • one year ago
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    Thank you so much! The number was really 39, but I tried it the same way you did it and I ended up getting 7.6 when rounded to one decimal place. Would that be correct?

  12. anonymous
    • one year ago
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    Which number would really be 39? 12.1?

  13. anonymous
    • one year ago
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    The 36 haha.

  14. anonymous
    • one year ago
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    Ohh my bad lol

  15. anonymous
    • one year ago
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    No worries.

  16. anonymous
    • one year ago
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    Yes, that's correct. You would get 7.61 if the angle was actually 39 degrees haha. Well I think you got it! Good luck!

  17. anonymous
    • one year ago
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    Thank you!

  18. anonymous
    • one year ago
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    Would you mind telling me if I'm doing this one correct too?

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  19. anonymous
    • one year ago
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    I'm doing sin 58= 4.0/x.

  20. anonymous
    • one year ago
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    Yup that's correct. you're on the right track! Keep going.

  21. anonymous
    • one year ago
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    So x=5?

  22. anonymous
    • one year ago
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    I got 4.716 but it's pretty close..?

  23. anonymous
    • one year ago
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    They would probably rather want your answer so thanks haha!

  24. anonymous
    • one year ago
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    Haha anything else just tag me @TheChancellor

  25. anonymous
    • one year ago
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    @TheChancellor Thank you so much. I'm sorry about all these questions. I'm taking a test and I really want to be sure that everything is correct. I have to recover my credits from my geometry class this past year so my school is making me take this online geometry course that has literally no correlation with the actual class I took lmao. I've never done trig before so it makes absolutely no sense to me that they would make me take a course with trig in it lol? And the lessons that the course gives are horrible so it's literally sink or swim for me when it comes to the tests lol. But anyway, to solve this one, would it just be 12/13=0.9?

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  26. anonymous
    • one year ago
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    No problem :o ! It's 12/13 = cosh 0.9 I think...

  27. anonymous
    • one year ago
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    Nevermind,

  28. anonymous
    • one year ago
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    Oh it's cos^-1. The inverse ^^

  29. anonymous
    • one year ago
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    Got it. I have no clue how to do this one.

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  30. anonymous
    • one year ago
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    @TheChancellor

  31. anonymous
    • one year ago
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    whoops sorry. I'm back.

  32. anonymous
    • one year ago
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    @IDK So first what we know is AC = AD + DC AD = AC - DC

  33. anonymous
    • one year ago
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    |dw:1441327965682:dw|

  34. anonymous
    • one year ago
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    Well we need to find the side length of the side BC first to find the whole triangle's base (AC)

  35. anonymous
    • one year ago
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    You following?

  36. anonymous
    • one year ago
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    Yup!

  37. anonymous
    • one year ago
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    So we're going to find the opposite of triangle BCD

  38. anonymous
    • one year ago
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    Opposite and adjacent, that's using tangent. So tan 40 = x/30

  39. anonymous
    • one year ago
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    You should get 25.17 when you've solved for x. So the height of the triangle is 25.17

  40. anonymous
    • one year ago
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    |dw:1441328488907:dw|

  41. anonymous
    • one year ago
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    So rounded to the nearest whole number, would the answer be 25?

  42. anonymous
    • one year ago
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    I suppose but we should keep it as a decimal right now since we're not finding BC.

  43. anonymous
    • one year ago
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    Now we have to solve for the whole triangle. Hypotenuse is 60, Opposite is 25.17 and angle A is 30 degrees

  44. anonymous
    • one year ago
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    Bear with me, I don't remember this too well :P So we can use any sides/angles to find the whole adjacent... I will use 60 and 30 degrees.

  45. anonymous
    • one year ago
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    So adjacent and hypotenuse ---> cos cos 30 = adjacent/60

  46. anonymous
    • one year ago
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    The whole length of the bottom side of the triangle once you've solved that would be 51.961 (apparently you didn't need to solve the other side but what do I know haha) Now take 51.961 - 30

  47. anonymous
    • one year ago
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    You should get 21.961... I think that should be AD. Do you understand what I did?

  48. anonymous
    • one year ago
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    I think so. Now that I write it down I understand it more. Thank you.

  49. anonymous
    • one year ago
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    Cheers. No problem! Keep at it and good luck.

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