Ask your own question, for FREE!
Mathematics 26 Online
OpenStudy (anonymous):

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!

OpenStudy (amistre64):

how did you get your answer?

OpenStudy (anonymous):

i do not know as to whether you know anything about Dot product or else , do you ?

OpenStudy (amistre64):

pointme has a good lead on this ;) good luck

OpenStudy (anonymous):

Given formula : u * v/ llull llvll = (6)(-1) + (7)(-4)/ sqrt((6^2) +(-1^2) * sqrt(7^2) +sqrt(-4^2))

OpenStudy (anonymous):

to find answer you need to use Dot product or Cross product

OpenStudy (anonymous):

Yes! That is the lesson that I am on! Dot Product!

OpenStudy (anonymous):

The formula I posted is the right formula to use?

OpenStudy (anonymous):

we know that A.B =|A||B|cos(angle) then the rest you can finish or are you still confused ?

OpenStudy (anonymous):

Sorry just a bit, so A.B really stands for U.V right? I don't have to introduce new numbers in?

OpenStudy (anonymous):

I actually solved the problem by plugging numbers in, I think I just need some help with converting the decimal answer into degrees.

OpenStudy (anonymous):

Thank you and sorry it took me a while to reply.

OpenStudy (anonymous):

let me work it one my book first , give me 30 seconds

OpenStudy (anonymous):

Thanks :)

OpenStudy (anonymous):

in failing to find scientific calculator , but the answer is arc cos(5.70559771103589)

OpenStudy (anonymous):

make sure that your calculator has DEG meaning degree on top

OpenStudy (anonymous):

on the unit circle that about rounds to 330 degrees...

OpenStudy (anonymous):

Oh okay! thank you so much :)

OpenStudy (amistre64):

|dw:1360609540538:dw|

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Latest Questions
euphoriiic: I drew more people !! ud83eudd17.
1 minute ago 41 Replies 3 Medals
euphoriiic: I drew markk ud83eudd17.
4 hours ago 34 Replies 2 Medals
LOLIAteYourMom: u2212243 = u22129(10 + x)
7 hours ago 0 Replies 0 Medals
Bubblezz: Art for @jeromeccv
7 hours ago 13 Replies 3 Medals
Bubblezz: Art for @jeromecv
11 hours ago 0 Replies 0 Medals
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!