Find the angle between the given vectors to the nearest tenth of a degree. u = <6, -1>, v = <7, -4> I calculated -.6933 as the answer, I just have to convert it to degrees but that is not on the unit circle. How do I convert? Am I doing this right? These are my answer choices: 20.3° 10.2° 0.2° 30.3° Thank you!
how did you get your answer?
i do not know as to whether you know anything about Dot product or else , do you ?
pointme has a good lead on this ;) good luck
Given formula : u * v/ llull llvll = (6)(-1) + (7)(-4)/ sqrt((6^2) +(-1^2) * sqrt(7^2) +sqrt(-4^2))
to find answer you need to use Dot product or Cross product
Yes! That is the lesson that I am on! Dot Product!
The formula I posted is the right formula to use?
we know that A.B =|A||B|cos(angle) then the rest you can finish or are you still confused ?
Sorry just a bit, so A.B really stands for U.V right? I don't have to introduce new numbers in?
I actually solved the problem by plugging numbers in, I think I just need some help with converting the decimal answer into degrees.
Thank you and sorry it took me a while to reply.
let me work it one my book first , give me 30 seconds
Thanks :)
in failing to find scientific calculator , but the answer is arc cos(5.70559771103589)
make sure that your calculator has DEG meaning degree on top
on the unit circle that about rounds to 330 degrees...
Oh okay! thank you so much :)
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