Find the angle θ between the vectors u = 6i + 8j and v = -4j. (negative 4j)
the possible answers are:

Θ =2.50 degrees
Θ can’t be found.
Θ = 36.87 degrees
Θ = 143.13 degrees

I calculated 143 but I cant be sure because I may not be allowed to do what I did.

Question

Find the angle θ between the vectors u = 6i + 8j and v = -4j. (negative 4j)
the possible answers are:

	
	Θ =2.50 degrees
	Θ can’t be found.
	Θ = 36.87 degrees
	Θ = 143.13 degrees

I calculated 143 but I cant be sure because I may not be allowed to do what I did.

jim_thompson5910 · Answer

What did you get before you rounded to 143?

anonymous · Answer

143.1301

anonymous · Answer

but that was an estimate assuming that v was at an angle of 270 and u was at 53.

anonymous · Answer

however i cant actually calculate the angle because you cant divide my zero

anonymous · Answer

never mind i found a way to calculate it.
u*v/||u||||v||

jim_thompson5910 · Answer

yeah I was about to mention that but you beat me to it lol

jim_thompson5910 · Answer

you would take the arccosine of that to get your angle