If `veca` is unit vector and `(vecx-a).(vecx+a)=12` then find `|x|`.

If for a unit vector a.(x-a).(x+a)=12 , then |x| is equal to

Find |vecx|, if for a unit vector veca, (vecx-veca).(vecx+veca) = 12 .

Find the value of |vecx| if for a unit vector a (vecx-veca)(vecx+veca)=8

If veca and vecb are two non collinear unit vectors and |veca+vecb|= sqrt3 , then find the value of (veca- vecb)*(2veca+ vecb)

Let veca and vecb be unit vectors such that |veca+vecb|=sqrt3 . Then find the value of (2veca+5vecb).(3veca+vecb+vecaxxvecb)

The unit vector parallel to vecA is

If vec x and vecy are unit vectors and |vecz| = 2/sqrt7 such that vecz + vecz xx vecx = vecy then find the angle theta between vecx and vecz

If vec x and vecy are unit vectors and |vecz| = 2/sqrt7 such that vecz + vecz xx vecx = vecy then find the angle theta between vecx and vecz

If the angle between unit vectors veca and vecb is 60^(@) . Then find the value of |veca -vecb| .