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2 Answers

An incorrect directional degree led to a mistake in my solution. Surendra K. has the correct solution.
 

Comments

Hello Arthur, With 79.28 SW
Angle A should be 169.28 degrees and not 100.83 degrees
 
ie. Angle CAB = 169.28 degrees.
 
Surendra,
Could you please explain how you got 169.28º. Thank you.
Arthur
If you draw the diagram
 
AB = 180 m
BC = 160 m
Angle BAC = 169 deg 17 min
 
Applying the formula
C^2 = a^2. + b^2 -2ab cos(169deg 17min)
 
C^2 = 32400+25600-2*180*160*cos(169 deg 17 min)
 
C= 338.5 mt
 
 
 
 
 

Comments

Surendra,
I just realized my mistake. I was making 79 degrees with the x-axis when I should have been making 79 degrees with the y-axis. Directional degrees is with the vertical. Thank you for correcting me.
Arthur D.