Find the resultant of two vo vector & and & and a Givenly B = 8 – & the angle between them in 90° Question Find the resultant oftwovo vector & and& and a GivenlyB = 8 – & theanglebetween them in 90° in progress 0 Math Lydia 1 month 2021-08-11T09:54:59+00:00 2021-08-11T09:54:59+00:00 1 Answer 0 views 0

## Answers ( )

Answer:The angle α which the resultant R makes with A is given by

tanα=

A+Bcosθ

Bsinθ

or

cos(θ/2)

sin(θ/2)

=

A+Bcosθ

2Bsin(θ/2)cos(θ/2)

which gives A+Bcosθ=2Bcos

2

(

2

θ

)

or A+B[2cos

2

(

2

θ

)−1]=2Bcos

2

(

2

θ

)

A=B