If `| vecA |` = `| vecB |` = `| vecA + vecB |` then find `theta` angle between them

If sqrt3|vecAxx vecB|= vecA*vecB , then find the angle between vecA and vecB .

If |vecA + vecB| = |vecA - vecB| , then the angle between vecA and vecB will be

If vecA.vecB = |vecA xx vecB| , find angle between vecA and vecB .

If veca +vecb +vecc=0, |veca|=3,|vecb|=5, |vecc|=7 , then find the angle between veca and vecb .

If veca +vecb +vecc=0, |veca|=3,|vecb|=5, |vecc|=7 , then find the angle between veca and vecb .

If veca +vecb +vecc =vec0, |veca| =3 , |vecb|=5 and |vecc| =7 , then the angle between veca and vecb is

If |vecA xx vecB| = |vecA*vecB| , then the angle between vecA and vecB will be :

If |veca|=|vecb|=|vecc|and veca+vecb=vecc then find the angle between veca and vecb .

Let veca and vecb be two non-zero vectors perpendicular to each other and |veca|=|vecb| . If |veca xx vecb|=|veca| , then the angle between the vectors (veca +vecb+(veca xx vecb)) and veca is equal to :