Question

Magnitude of two resultant of two equal forces is equal to the magnitude of either them . what is the angle between them .
(a) 60°
(b) 120°
(c) 360°
(d) 180°
it is class 11 question​

Answer 1

Answer:

b. 120°

Explanation:

$r \: = \sqrt{ {a}^{2} + {b}^{2} + 2a \: b \: \cos( \alpha ) }$