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.

Get our expert's

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this and **thousands** of other questions.

I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!

Get this expert

answer on brainly

SEE EXPERT ANSWER

Get your **free** account and access **expert** answers to this and **thousands** of other questions

I know Scalar and Dot Product. @anikhalder I sort of know magnitude...

That's perfect! So let's go through this:
What is the length of u vector?

I'm not sure how to solve for length...

Oh! Is the magnitude |u| = SqRt. 41 ?

Perfect! You rock!
What about the magnitude (or length) of vector v?

|v| = 5 ?

Awesome! Now do you know the formula for dot (or scalar) product of 2 vectors a and b?

Yes, would the product be: a x b = 32 ?

Is costheta = .99 ?

Yes! I find so as well. Now just find the cosine inverse of 0.99 and you'll get it in degrees

I got 8.1 degrees, approximately, but that is not one of my answers.

That's what I get and now I must confess that I am confused as well

Let's verify

Ok

I am getting .99

@anikhalder Can you help me with another problem, and then maybe go back to this one?

oh wait

Express the complex number in trigonometric form.
-3 + 3 square root of three i

http://www.rapidtables.com/calc/math/Arccos_Calculator.htm

And I'm confused as to what that calculator meant.

Oh. I see. So the answer would be 1.8 degrees?

What video?

Sorry...my bad i forgot to give the link:
https://www.youtube.com/watch?v=6z6fzPXUbSQ

What is the Z value?

And is the theta value 120 degrees?

oho...i forgot the minus sign...yep!

Ok, so the theta value is 120 degrees? Not 150?

Wait hold on, how is r coming to 3sqrt3 it should be 6

Oh. Ok, how do you get 6?

|dw:1437768935393:dw|

Oh ok thanks. So it would be the same answer, but 6 as r vs. 3sqrt3 as r?

yes it would 6(costheta + i sintheta)

Ok thanks! Theta = 2pi/3 right?

yes. because tantheta in this case is 3sqrt3 / -3 which will give theta as 2pi/3

Thanks so much!

Thank you very much for bearing with me! My pleasure! Have a nice night! I will go to sleep!