If `hata and hatb` are two unit vectors and `theta` is the angle between them then vector `2hatb+hata` is a unit vector if (A) `theta= pi/3` (B) `theta=pi/6` (C) `theta=pi/2` (D) `theta=pi`

Let -> a and -> b be two unit vectors and is the angle between them. Then -> a+ -> b is a unit vector if (A) theta=pi/4 (B) theta=pi/3 (C) theta=pi/2 (D) theta=(2pi)/3

Let -> a and -> b be two unit vectors and is the angle between them. Then -> a+ -> b is a unit vector if(A) theta=pi/4 (B) theta=pi/3 (C) theta=pi/2 (D) theta=(2pi)/3

If a and b are unit vectors and theta is the angle between them then a-b will be a unit vector if

If hata and hatb are unit vectors and theta is the angle between them show that sin (theta/2)= 1/2 |hata-hatb|

Choose the correct answer. Let veca"and"vecb be two unit vectors and theta be the angle between them.Then veca+vecb is a unit vector, if: a) theta=pi/4 b) theta=pi/3 c) theta=pi/2 d) theta=(2pi)/3

If vec a\ a n d\ vec b be two unit vectors and theta is the angle between them. Then vec a+ vec b\ is an unit vector, if theta= pi/2 b. (2pi)/3 c. pi/4 d. pi/3

If vec a and vec b be two unit vectors and theta is the angle between them.Then vec a+vec b is an unit vector,if theta=(pi)/(2) b.(2 pi)/(3) c.(pi)/(4) d.(pi)/(3)