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Angle ABC (Posted on 2006-02-25) Difficulty: 3 of 5
In a triangle ABC, D is the midpoint of BC. Join AD. Angle ADB = 45 degree and angle ACB = 30 degree. Find angle ABC.

No Solution Yet Submitted by akash    
Rating: 2.3000 (10 votes)

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re: Solution - A little jumpy, don't you think? | Comment 2 of 17 |
(In reply to Solution by Bractals)

How did you jump from here: 

 2 cos(15)         1
   ----------- = ------------
      sin(?)      sin(135-?)

  to here:          or
    Angle ABC = ? = 105 degrees
?

  Posted by Eric on 2006-02-25 14:41:04
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