Basic Examples 
(2)
 

Return the angle between two vectors:
In[149]:=
[◼]
SignedVectorAngle
[{1,0},{0,1}]
Out[149]=
π
2
———
If the second vector is clockwise from the first vector, the result is negative:
In[150]:=
[◼]
SignedVectorAngle
[{0,1},{1,0}]
Out[150]=
-
π
2

Properties and Relations 
(1)
 
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