Question

The components of a vector B⃗ satisfy Bx>0 and By<0.
Is the direction angle of B⃗ between 0 ∘ and 90 ∘, between 90 ∘ and 180 ∘ , between 180 ∘ and 270 ∘, or between 270 ∘ and 360 ∘?
1) the direction angle of B⃗ is between 0 ∘ and 90 ∘
2) the direction angle of B⃗ is between 90 ∘ and 180 ∘
3) the direction angle of B⃗ is between 180 ∘ and 270 ∘
4) the direction angle of B⃗ is between 270 ∘ and 360 ∘

Answer 1

Draw a sketch of the vector B with one end of it at the origin, using the information given.
The answer should be fairly obvious once you have the diagram.

Answer 2

hah yah it was easy haha i wasnt think ing thanks!

Answer 3

: )