Question

The resultant of two vectors of magnitudes (P+Q) and (P-Q) is P^2 + Q^2. The angle between the vectors is​

Answer 1

Answer:

90

Explanation:

use formula

R=√(a2+b2+2ab costheta)

now put R=p2+q2

and a=p+q

b=p-q

you theta=90

fallow me