Calculate Fore Bearing from Deflection Angle

First of all, make sure you are working in Degree Mode in Scientific Calculate, I suggest Calculator Casio FX-100MS 

Rules: -

Here are some very important Rules, that you have to understand and consider during whole process

1- Unit of Angle measure is Degree
2- If you find any answer more than 360, then minus 360 from the result
3- If you find answer in - Sign than you have to solve with +360

First of all, calculate fore bearing of line A to O with the help of given coordinates and  keep in mind we need fore bearing of AO Line using any scientific calculator,
Coordinates of A = E 1000 O= E 918.878
               N 5000      N 5088.628

Note: - If you need Fore Bearing from A to O, you need to deduct coordinates from O to A, then you can find correct Fore Bearing from A to O, you can find this details using Polar method in scientific calculator

Distance = Pol (Northing O-Northing A, Easting O-Eating A)

Note: - Whatever answer is press RCL+Tan, if answer is in + Sign then ok, otherwise type +360, this will be your fore bearing from A to O

Fore Bearing = RCL+ Tan, if answer + then ok otherwise +360 as I mentioned above.

Result is 
Distance = 120.149 m
Fore bearing =-42°-28"-5.33"

Calculations

Note:-AO, AB, BC, CD, DE & EF are lines of a traverse

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AO- Fore Bearing

-42°-28"-5.33" (Fore bearing is in minus sign, add +360°
+360°-0"-0"
-------------------
317°-31"-54.6"

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AB- Fore Bearing 

317°-31"-54.6"
+98°-50'-8" (for Clockwise add this angle into previous fore bearing)
-------------------
416°-22'-2.6" (as this is more than 360°, then minus 360° from this
-360°-0'-0"
------------------
56°-22'-2.6"

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BC- Fore Bearing 

56°-22'-2.6"
+53°-38'-38" (for Clockwise add this angle into previous fore bearing)
-------------------
110°-0'-40.6"

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CD- Fore Bearing 

110°-0'-40.6"
-43°-39'-51" (for Anti Clockwise add this angle into previous fore bearing)
-------------------
66°-20'-49.6"

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DE- Fore Bearing 

66°-20'-49.6"
+60°-20'-9" (for Clockwise add this angle into previous fore bearing)
-------------------
126°-40'-58.6"

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DE- Fore Bearing 

126°-40'-58.6"
-130°-58'-45.2" (for Anti Clockwise add this angle into previous fore bearing)
-------------------
-4°-17'-46.6" (since this fore bearing is in minus sign, you need to +360°)
+360°-0'-0"
-------------------
355°-42'-13.4"

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