Quick check? Thank You for helping! Use the formula v1*v2=|v1||v2|cos theta to find the cosine of the angle between the two vectors (-7,8) and (1,0). I got cos theta=-7/10.63. Is this correct? Thanks!

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Quick check? Thank You for helping! Use the formula v1*v2=|v1||v2|cos theta to find the cosine of the angle between the two vectors (-7,8) and (1,0). I got cos theta=-7/10.63. Is this correct? Thanks!

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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Other answers:

I'm getting the same result
Cool, so from there I can take the inverse and get what theta is?
correct
Awesome, thanks for the help!
you're welcome
@Notsephirorth For this kind of calculations, it is best to leave the radical sqrt(113) because it is the exact value. 10.63 is only an approximation to sqrt(113).
@mathmate Thanks for the advice. Unfortunately I already submitted the assignment. Thanks though!

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