Formula for calculating Mid Point between two points in the Circle

circle.png
In the attached File:
Circle 1: The two points in 15 degree and 340 degree . How do I calculate the mid point of the Both.
Circle 2 : The two points in 85 degree and 250 degree . How do I calculate the mid point of the Both.
Example 1:
First Point: 15 degree
Second point: 21 degree
Midpoint : 18 Degree

Example 2:
First Point: 355 degree
Second point: 15 degree
Midpoint : 5 Degree (here 0, 360 are same point)

I am happy if It is only one formula for all difference. Thanks in advance

Does this help:

Formula:

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Dear Friends,

thanks for the reply..
It is not working for me.
thanks

XOR LX solution should work.
For what two numbers it doesn't?

Dear ZBOR & XOR LX,

XOR LX solution working... Thanks a lot XOR LX...

I need one more help.

I need to add seconds to date & times.

(ie).. if the Date and Time is Dec 31, 2013 11:45:05 AM and if a add 173455 seconds to this date (173455 sec = 2 days, 10 min and 55 sec)

The result should be Jan 02, 2014 11:56:00. I try to use Time formula but i cant get it done.
In the same if i minus the value i need to get the date and time.

Note: I only use seconds to add / subtract..

Thanks in advance..

It's a new question.. open new thread.

Ya sure...