Hi i'm new,
I have been trying to solve this for a couple of days and had to just give up. Hopefully it is in the right topic.
I have a system which gives me the answer to COS(A+B) and I can work out what B is.
COS(A+B) = (Known Varible Output)
B = (Known Constant)
What is COS A ?
(I don't need to know what A is - just COS A)
The solution needs to work for a full COS cycle (i.e. 0 to 2PI) therefore the answer is not COS((COS-1(A+B))-B) !
I have been trying to use COS(A+B)=COSACOSB-SINASINB
with no luck just can't seem to be able to rearange the formula.
If anyone can solve this I would be very thankful/amazed.