Let a and b be two unit vectors and `theta` be the angle between them then `|bar(a)+bar(b)|^2-|bar(a)-bar(b)|^2=`

bar(a) and bar(b) are two unit vectors and theta be the angle between them then sin theta/2 : (A) |bar(a)-bar(b)| (B) |bar(a)+bar(b)| (C) (1)/(2)|bar(a)-bar(b)| (D) (1)/(2)|bar(a)+bar(b)|

" Let vec(a) and vec(b) be unit vectors with theta as the acute angle between them if (1)/(2)|bar(a)-bar(b)|=sin lambda theta then 4 lambda^(2)=

If bar(a) and bar(b) are two non-zero vectors and theta is angle between then,the cos theta is

If bar(a) and bar(b) are two non-zero vectors and theta is angle between then,the cos theta is

Given that bar(a) and bar(b) are two unit vectors such that angle between bar(a) and bar(b) is cos ^(-1)((1)/(4)). If bar(c) be a vector in the plane of bar(a) and bar(b), such that |vec c|=4,vec c xxvec b=2vec a xxvec b and vec c=lambdavec a+mubar(b) then,find

If bar(a) and bar(b) are two vectors perpendicular each other, prove that (bar(a) + bar(b))^(2) = (bar(a) - bar(b))^(2)

bar(x) and bar(y) are unit vectors and the angle between them is theta . If theta = …………….. Then bar(x)+bar(y) is a unit vector.

If a and b are unit vectors such that |bar(a)timesbar(b)|=bar(a)*bar(b) then |bar(a)-bar(b)|^(2)=

If bar(a),bar(b) aretwo unit vectors such that |bar(a)xxbar(b)|=2 then the value of [bar(a)bar(b)bar(a)xxbar(b)] is