anonymous
  • anonymous
expresss complex number in rectangular form \[\sqrt{7}*cis*2.1 \]
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
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.
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
is that cosine ?
anonymous
  • anonymous
its cis cos+isin
anonymous
  • anonymous
yes it is stupid notation for \[cos(\theta)+i sin(\theta)\]

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
im trying square of 7 which is 2.64 times cos but cos(?)
anonymous
  • anonymous
i also assume that you are working in radians, not degrees. So just use a calculator. \[\sqrt{7} [cos(2.1)+i sin(2.1)]\]
anonymous
  • anonymous
i get -1.336 for a and 2.284 for b (rounded) so answer is -1.336 + 2.284 i
amistre64
  • amistre64
the cosine part relates to the x coord; the i sin part relates to the y coord right?
amistre64
  • amistre64
Did the others parse it tight to be: cos(2.1) + i sin(2.1)?
amistre64
  • amistre64
(-1.34, 42.30) is what i get with radian measurements...
amistre64
  • amistre64
2.28.. musta hit a wrong buttononthe calc :)
anonymous
  • anonymous
yes cosine is x and sine is y, usually written as a and b as in a + bi. I doubt it is (-1.34,42.3) for two reasons: the rectangular form of a complex number is a number, not a coordinate. so it should look like a + bi also we know that the absolute value of that number is \[\sqrt7\]
amistre64
  • amistre64
correct, its similar to polar coordinates in that respect. But i think the exercise here is to see that complex numbers are nothing new and that they can be plotted in the same manner as rectangular coords...right?

Looking for something else?

Not the answer you are looking for? Search for more explanations.