Trig Problem With Vectors

[muiras]

I have a question on finding the counter clockwise angle the vector difference B-A makes with the +x axis
I already have the components of vector difference for B-A and I have checked that they are correct they are 2.77,-5.95
I started with doing the tan function (opp/adj) which was -5.95/2.77
I got -2.148 which I found the tan(-2.148) to be -1.536
I then found the arctan to be 56.934
I then subtracted 360-56.93 and got an answer to be 303.07
This proved to be wrong and I am wondering if someone could help find where my mistake is.

 

[Deleted member 4993]

I have a question on finding the counter clockwise angle the vector difference B-A makes with the +x axis
I already have the components of vector difference for B-A and I have checked that they are correct they are 2.77,-5.95
I started with doing the tan function (opp/adj) which was -5.95/2.77
I got -2.148 which I found the tan(-2.148) to be -1.536
I then found the arctan to be 56.934
I then subtracted 360-56.93 and got an answer to be 303.07
This proved to be wrong and I am wondering if someone could help find where my mistake is.

tan(Θ) = (-5.95)/2.77 = -2.14801

arctan(-2.14801) = - 1.13509 radian

Θ = - 1.13509 radian = - 65.0358° or 294.9642