​ Angle between two unit vector A and B is θ. Then choose correct option.

Question

Angle between two unit vector \(\vec A\) and \(\vec B\) is θ. Then choose correct option.

(1) \(|\vec A + \vec B| = |\vec A - \vec B|tan\frac\theta2\)

(2) \(|\vec A - \vec B| = |\vec A + \vec B|tan\frac\theta2\)

(3) \(|\vec A + \vec B| = |\vec A - \vec B|cos\frac\theta2\)

(4) \(|\vec A - \vec B| = |\vec A + \vec B|cos\frac\theta2\)

Answer 1

Correct option is (2) \(|\vec A - \vec B| = |\vec A + \vec B|tan\frac\theta2\)