Question

What is the magniude and direction of ` ( hat I + hat j) ?`

Answer 1

Magnitude of ` (hat v + hat j) =| hat I + hat j|`
`=sqrt ((1)^(2) + (1)^(2))=sqrt 2`
Let ` (hat I + hat j)` make an angle ` beta` with the direction of ` hat i` then
` tan ` beta =1//1=1 tan 45^(@) , :. Beta =45^(@)`.