If `|veca|=3,|vecb|=4a n d` the angle between `aa n db` is `120^@` , then find the value of `|4veca+3vecb|dot`

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

Let veca, vecb, vecc be three unit vectors and veca.vecb=veca.vecc=0 . If the angle between vecb and vecc is pi/3 then find the value of |[veca vecb vecc]|

If veca, vecb,vecc are unit vectors such that veca.vecb = 0= veca.vecc and the angle between vecb and vecc is pi//3 then the value of |vecaxxvecb -veca xx vecc| is

If |veca+ vecb| lt | veca- vecb| , then the angle between veca and vecb can lie in the interval

If |veca|=2, |vecb|=5 and |vecaxxvecb|=8 then find the value of veca.vecb

Let vecA and vecB be two non-parallel unit vectors in a plane. If (alpha vecA + vecB) bisets the internal angle between vecA and vecB then find the value of alpha .

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

If veca and vecb are two vectors, such that |veca xx vecb|=2 , then find the value of [veca vecb veca xx vecb]

If veca and vecb are two vectors, such that veca.vecblt0 and |veca.vecb|=|vecaxxvecb| then the angle between angles between the vectors veca and vecb is