Math - Trigonometry

• Darkness_hacker99

  6 Aug 07, 17:34

  
  
  I am stuck at this question. Can anyone help me please. Thanks.
  
  The answer provided is 118.4 degree.
• stellazio

  6 Aug 07, 17:36

  u cna find angle ADB and BDC right using some formula?
• kalangkabo

  6 Aug 07, 17:42

  eh... your qn put 35 degrees, but your diagram show 33 degrees?
  
  what standard? got learn before |A|/sinA = |B|/sinB = |C|/sinC or not?
  
• Darkness_hacker99

  6 Aug 07, 17:42

  Originally posted by stellazio:

  u cna find angle ADB and BDC right using some formula?

  Yes for Angle ADB. No for Angle BDC, the info are not enough.
• Darkness_hacker99

  6 Aug 07, 17:43

  Originally posted by kalangkabo:

  eh... your qn put 35 degrees, but your diagram show 33 degrees?
  
  what standard? got learn before |A|/sinA = |B|/sinB = |C|/sinC or not?
  

  opps typo.
  
  Oh ya.. Use sin rule to find.
  
  Now then I saw it.
  
  Thx kalangkabo
• dbowie

  6 Aug 07, 17:45

  sorry calculator spoilt, all i can tell you is ADB is sin-1 0.44
• Darkness_hacker99

  6 Aug 07, 17:49

  
• dbowie

  6 Aug 07, 17:53

  hey darky pls elaborate on how to do.. quite interested to know as I am quite stupid ..
• Darkness_hacker99

  6 Aug 07, 18:02

  Originally posted by dbowie:

  hey darky pls elaborate on how to do.. quite interested to know as I am quite stupid ..

  Nah.. You're not stupid.
  
  
  
  Dunno why today I quite blur..
• Darkness_hacker99

  6 Aug 07, 18:03

  I want to thank everybody for help me this question. Thanks ya..
• dbowie

  6 Aug 07, 18:45

  I didn't notice the CAD
• Darkness_hacker99

  6 Aug 07, 19:07

  Originally posted by dbowie:

  I didn't notice the CAD

  Yar.. Yesterday I also didn't notice.
• eagle

  6 Aug 07, 19:08

  I just come online only, and all the questions solved liao... Good good good... save my brain cells for other things =D
• Darkness_hacker99

  6 Aug 07, 19:09

  Originally posted by eagle:

  I just come online only, and all the questions solved liao... Good good good... save my brain cells for other things =D

  
• lpx88

  6 Aug 07, 22:34

  *Edit*Wait i got it
  
  Actually got another method.Use a simple sine rule will do it
  
  22 / sin CAD = 25 / sin 33
  
  CAD=sin-1 22 / (25/sin 33)
  
  =28.6 degrees
  
  ADC= 180 degrees - 23.6 degrees - 33 degrees = 118.4 degrees
• Darkness_hacker99

  6 Aug 07, 22:59

  Originally posted by lpx88:

  Actually got another method.Use a simple sine rule will do it
  
  22 / sin CAD = 25 / sin 33
  
  CAD= 22 / (25/sin 33)
  
  =45.9 degrees
  
  ADC= 180 degrees - 45.9 degrees - 33 degrees = 118.4 degrees

  But 180 - 45.9 - 33 = 101.1
• lpx88

  6 Aug 07, 23:18

  Originally posted by Darkness_hacker99:

  But 180 - 45.9 - 33 = 101.1

  Sry damn tired just now...Careless...Ans revised