If `hat n_1 ,hat n_2` are two unit vectors and theta is the angle between them, then `cos(theta/2)` is equal to

If widehat n_(1),widehat n_(2) are two unit vectors and theta is the angle between them,then cos((theta)/(2)) is equal to

If vec(e_(1)) and vec(e_(2)) are two unit vectors and theta is the angle between them, then sin (theta/2) is:

If vec(e_(1)) and vec(e_(2)) are two unit vectors and theta is the angle between them, then sin (theta/2) is:

If vec(e_(1)) and vec(e_(2)) are two unit vectors and theta is the angle between them, then sin (theta/2) is:

Let hat(a), hat(b) be two unit vectors and theta be the angle between them. What is cos ((theta)/(2)) equal to ?

Let hat(a), hat(b) be two unit vectors and theta be the angle between them. What is sin ((theta)/(2)) equal to ?

If vec(a) and vec(b) are unit vectors and theta is the angle between them, then what is sin^(2)((theta)/(2)) equal to?