Question

Two factors having equal magnitude 'p' are at an angle theta with each other. the value of theta when magnitude of their resultant is-
(I)zero
(ii)2p
(III)p
(iv)p√2​

Answer 1

Answer:

$r = \sqrt{ {p}^{2} + {p}^{2} + 2.p.p \cos( \alpha ) }$

$r = \frac{p}{ \sqrt{2} }$