3 years ago

1/2 percent, round to three positions

Mathematics

1 answer:

Tamiku [17]3 years ago

8 0

I think the answer would be 0.005

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Let z= -5 sqrt 3/2 + 5/2i and w=1 + sqrt 3i

MrRissso [65]

$z=-\dfrac{5\sqrt3}2+\dfrac52i=5\left(-\dfrac{\sqrt3}2+\dfrac12i\right)=5e^{i5\pi/6}$

$w=1+\sqrt3\,i=2\left(\dfrac12+\dfrac{\sqrt3}2i\right)=2e^{i\pi/3}$

b. Not exactly sure how DeMoivre's theorem is relevant, since it has to do with taking powers of complex numbers... At any rate, multiplying $z$ and $w$ is as simple as multiplying the moduli and adding the arguments:

$zw=5\cdot2e^{i(5\pi/6+\pi/3)}=10e^{i7\pi/6}$

c. Similar to (b), except now you divide the moduli and subtract the arguments:

$\dfrac zw=\dfrac52e^{i(5\pi/6-\pi/3)}=\dfrac52e^{i\pi/2}$

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3 years ago

Làm ơn hãy giúp tôi <br> (a+b)²<br> (a-b)²

marysya [2.9K]

Answer:

$(a + b) ^{2} = {a}^{2} + 2ab + {b}^{2} \\ (a - b) ^{2} = {a {}^{2} - 2ab + {b}}^{2}$

Step-by-step explanation:

hopethe answer helped you :)

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2 years ago

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Five workers dig a trench 5 yards long in 5 hours. How many workers are needed to dig a 100 yards long in 100 hours?

Pavlova-9 [17]

I think it would require 100 workers since 1 worker digs up 1 yard.

Hope this helps.

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3 years ago

Which of the following is the graph of y=3 sec [ 2(x-pi/2)] + 2

asambeis [7]

Answer:

A.) The first graph

Step-by-step explanation:

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A piece of paper can be made into a cylinder in two ways : by joining the short sides together, or by joining the long sides tog

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They hold the same amount i think

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3 years ago