## anonymous 3 years ago Determine the measure of x

• This Question is Open
1. anonymous

|dw:1358388607551:dw|

2. anonymous

Using trigg .. how would you determine the value of x ?

3. Kuoministers

use cos rule

4. anonymous

yee but how would I plug everything in.. I did it on my test and got it wrong :/

5. Kuoministers

you just plug it in LOL!!! make sure when you get your answer you need to do inverse cos?

6. Kuoministers

7. anonymous

lmaao I sound dumb but its actually confusing to me :$I did it and he wrote "bad form" ? I got 1 out of 3 marks . 8. Kuoministers can you pls show me your working out? 9. Kuoministers you gotta make sure that 17cm is C 10. anonymous yee i put 17 cm as c .. im confused as to how you know its c ? 11. Kuoministers 12. anonymous ohh okk ! 13. Kuoministers you want to find x right? so x has to be c and opposite x is C got it!!?? 14. Kuoministers try again and lets see what answer you got? 15. anonymous ok im gonna try it 16. anonymous 17. anonymous Is this correct? @kuoministers 18. anonymous when i got the decimal, i did the inverse of cos 19. Kuoministers YES!!! but it needs to be in degrees. still right 20. anonymous YES! thank you, its gonna help alot for my exam tommoro :) 21. Kuoministers cheers :) 22. Kuoministers ill give you another tip 23. anonymous Please do! 24. Kuoministers if the side is the longest the angle will also be the largest because often question ask to find the largest angle 25. Kuoministers the angle opposite to that side sorry 26. anonymous ok understood, thank you! 27. Kuoministers eg... on your question the angle opposite 21 will be the largest. which is angle y 28. anonymous ok wait I have another question, give me a few more mins please 29. anonymous 30. Kuoministers for this you need the sin rule 31. anonymous does this have the same kind of concept? 32. anonymous okk 33. Kuoministers you need to know all the sin and cos rules 34. Kuoministers 35. anonymous okk I understand that very well now how about for this question ? how would you solve it.. it has 2 parts 36. anonymous it includes the angle of depression 37. Kuoministers ahaha this question is long :P 38. Kuoministers 39. Kuoministers that angle is 8 degree btw 40. anonymous I knooow LOOL :p sorrrry .. i have liek a million questions but I dont wanna be annoying! honestly my teacher's no help at all and I have my exam tommoroe :$ Thank you soo much for your help tho!

41. anonymous

ohh ok

42. Kuoministers

43. Kuoministers

do you know how to solve it now? or do i need to go further?

44. anonymous

Mind going further? How did you get 8 ?

45. Kuoministers

my bad its 98 IM SORRY >.<

46. anonymous

yes that makes more sence :)

47. Kuoministers

im solving 4 question at once and my own HW...

48. Kuoministers

49. anonymous

50. Kuoministers

calculus homework isnt fun... try to avoid it :D

51. anonymous

I have to take calculus and functions and all that jazz .. I want to be a dentist ! we need all that LOL *sigh*

52. Kuoministers

you are in year 9-10 i presume?

53. Kuoministers

oh understand how to do part a) now?

54. anonymous

using cos rule for the triangle in red will help get the distance right ?

55. Kuoministers

yes

56. anonymous

yees and yees 10

57. Kuoministers

sorry if its extremely messy now

58. anonymous

no dw its not! and okk I understand now. Im going to try solving it on my own now and will ask questions if I get stuck:)

59. Kuoministers

to find b) it would be similar from finding a) gl with getting the correct answer

60. Kuoministers

sure :)

61. Kuoministers

you can see anytime if im online and message me if your my fan :P

62. anonymous

ahhaha will do! You were great help btw thaanks

63. Kuoministers

hey :)

64. anonymous

hahhaa help me !! :(

65. Kuoministers

sure

66. Kuoministers

now you can work it out?

67. Kuoministers

im going out for lunch soon :) so ill try to make it quick

68. Kuoministers

69. anonymous

x = 1.33km ? \

70. Kuoministers

yes i got something similiar to that!!!

71. anonymous

OMGG Thank God !!

72. anonymous

I swear I thought I was never gonna understand this .

73. Kuoministers

1.339618281

74. Kuoministers

yea well done :)

75. Kuoministers

now lets see you do number b O.O :D

76. anonymous

yess got exactly taht

77. anonymous

lol oh great ;P

78. Kuoministers

so have you gotton a answer for b yet?

79. anonymous

1.33 km ??

80. anonymous

1.325968944 ? full answer I got

81. Kuoministers

1.326581208 close enough :)

82. Kuoministers

$\Huge{\color{red}{\leftarrow \boxed{\mathbb{\text{CongratS}}}}}$

83. Kuoministers

lol idk what im pointing to :P

84. anonymous

omg YESS!, it took me alot of thinking even after you explained it lmaaao!

85. anonymous

hahaaa ;P thaaanks girl? or guy? lol you helped me alot

86. anonymous

almost midnight here, need to sleep lol !! Wish me luck for tommoroe:)

87. Kuoministers

guy :D

88. Kuoministers

i just find this cat humorous