## ze4life 2 years ago find the value of x

1. Brittni0605

Do you know law of sines?

2. ze4life

i couldn't do it on this

3. Brittni0605

yes, you can to find the angle x.

4. Brittni0605

|dw:1355438129894:dw|

5. ze4life

x=sin-1(.0087679 then what do i do

6. Brittni0605

Umm, that decimal is incorrect.

7. Brittni0605

|dw:1355438776265:dw|

8. ScottB05

Guys you cant use the law of sines on a triangle that's not 90 degrees angle, right????

9. ScottB05

Looks to me like\[c^{2} = a^{2} + b^{2} - 2bc CosA\]

10. ScottB05

Correct me if I'm wrong; please - Is that triangle a right angle??

11. ze4life

i have no clue what do u think brittini

12. ze4life

nd no its not a right angle

13. Brittni0605

Law of sines is not only for right triangles.

14. Brittni0605

You cant use law of cosines, and I think if you were to try @ScottB05 's setup is incorrect.

15. Brittni0605

Ok, you still cant use the law of cosines.

16. ze4life

but how do i start in this problem

17. Brittni0605

I would say since the angles in a triangle must add to 180 degrees. Find your missing angle.

18. ScottB05

19. ScottB05

Oh.... Right ignore me completely you made a mistake apparently - I'm so stupid sometimes -.-

20. ze4life

im confused

21. Brittni0605

I still disagree with @ScottB05

22. ScottB05

With good reason, I said I'm wrong already xD

23. Brittni0605

Oh, okay. :p

24. ze4life

now u think its solved by the law of cosines

25. Brittni0605

No, I think law of sines

26. ze4life

okay srry but lets start from the beginning because i got messed up with all this srry brittini

27. Brittni0605

No prob.

28. ze4life

thnxs k

29. Brittni0605

|dw:1355440194446:dw|

30. Brittni0605

So, since you know two angles..can you find the third one? Hint: all angles in a triangle add up to 180 degrees

31. ze4life

63 degrees

32. Brittni0605

Great, so now your triangle looks like: |dw:1355440610624:dw|

33. ze4life

:-( can u show me the equation to help solve it

34. Brittni0605

You can use law of cosines.

35. Brittni0605

|dw:1355441141043:dw|

36. Brittni0605

|dw:1355441267636:dw|

37. ze4life

x=1924.7 its so off

38. ze4life

what did u get brittni

39. ScottB05

@Brittni0605 You've done what I've done way up My answer to that equasion was x = 26.9

40. ze4life

i know but i did something wrong

41. ze4life

wait actually u did the wrong problem this is the right one |dw:1355443147072:dw|

42. ze4life

can u try to solve it and see what u get

43. ScottB05

|dw:1355443262333:dw|

44. ze4life

thats much better thnxs i really understood my mistake

45. ScottB05

I may still be wrong but I believe this to be correct. Right until proven wrong =)

46. ze4life

i think its the right answer

47. Brittni0605

oops, sorry guys, I was eating.

48. ze4life

hhh its alright so i think we got the right answer

49. ScottB05

I'd be happier if @Brittni0605 double checked my answer - I was wrong before :)

50. ze4life

what do u think brittni

51. Brittni0605

Hm, this is interesting. The picture must be drawn incorrectly, two angles are equal so it has to be an isosceles triangle.

52. ze4life

its not exactly the same as the assignment but im new in this drawing thing

53. Brittni0605

|dw:1355444759541:dw|

54. Brittni0605

maybe that's better..

55. ze4life

yup way better :p

56. Brittni0605

I agree with thinking x= 9.56

57. ze4life

thnxs people i will close the question and i really appreciate ur help

58. Brittni0605

Yep, np.

59. ScottB05

|dw:1355445651964:dw|Hmm... Wait actually... Haha I just saw something cause u drew it like that

60. Brittni0605

Hmm..

61. Brittni0605

62. ScottB05

|dw:1355446061993:dw|Of course :L

63. Brittni0605

Hmm, and for the original triangle..xsin54 = 8sin63, x= 8.81

64. ScottB05

So looks like we found a solution, x = 8.81; after about 2 hours? :)

65. Brittni0605

Lol, phew, I feel so dumb.

66. ze4life

hhh really its hilarious so THE ANSWER IS 8.81 for sure :p

67. Brittni0605

Yes, I agree. Sigh.

68. ScottB05

Well in Scotland it's 1.10 am; I can sleep happy knowing it's solved! :)

69. Brittni0605

Ohh, wow. Well goodnight-ish then..lol.

70. ScottB05

Haha, cheers, gn ;) Maybe I can blame my stupic mistakes on the time? :D

71. Brittni0605

Lml..we both made silly mistakes, just bc we are human.

72. ScottB05

You hope I'm human.... :')

73. Brittni0605

..oh no, im scared..I do hope you're human..lol.