What is the geometrical significance of the relation `|veca+vecb|=|veca-vecb|`?

What is the angle between veca and the resultant of veca+vecb and veca-vecb ?

If vecA and vecB are non-zero vectors which obey the relation |vecA+vecB|=|vecA-vecB|, then the angle between them is

For any two vectors veca and vecb prove that |veca.vecb|<=|veca||vecb|

Evaluate the expression (veca-vecb)xx(veca+vecb)=

Four vectors veca, vecb, vecc and vecx satisfy the relation (veca.vecx)vecb=vecc+vecx where vecb.veca ne 1 . The value of vecx in terms of veca, vecb and vecc is equal to

If veca and vecb are non - zero vectors such that |veca + vecb| = |veca - 2vecb| then

If veca , vecb are unit vectors such that the vector veca + 3vecb is peependicular to 7 veca - vecb and veca -4vecb is prependicular to 7 veca -2vecb then the angle between veca and vecb is

If veca,vecb,vecc are three mutually perpendicular vectors, then the vector which is equally inclined to these vectors is (A) veca+vecb+vecc (B) veca/|veca|+vecb/|vecb|+vec/|vecc| (C) veca/|veca|^2+vecb/|vecb|^2+vecc/|vecc|^2 (D) |veca|veca-|vecb|vecb+|vecc|vecc

Three vectors vecA, vecB and vecC satisfy the relation vecA. vecB=0 and vecA. vecC=0. The vector vecA is parallel to

Find |veca-vecb| , if two vector veca and vecb are such that |veca|=4,|vecb|=5 and veca.vecb=3