Question

Analytical method of parallelogram law of vector addition

Answer 1

Answer:

you can just use formula

R²=A²+B²+2ABcosO if cosO is zero then 2ABCosO will be zero

Answer 2

Answer:

If two vectors acting simultaneously at a point can be represented both in magnitude and direction by the adjacent sides of a parallelogram drawn from a point, then the resultant vector is represented both in magnitude and direction by the diagonal of the parallelogram passing through that point.