3 years ago

Find the product of z1 and z2, where z1 = 5(cos 60° + i sin 60°) and z2 = 7(cos 210° + i sin 210°)

1 answer:

3 0

Answer:

cos210=cos(180+30)=−cos30=−√32 . sin210=sin(180+30)=−sin30=−12 . 3(cos210+isin210) =3(−√32)+3i(−12). −(32)√3−(32)i. My favourite way of seeing that sin30=12 and cos30=√32 is ...

Step-by-step explanation:

But that's what I say personally

You might be interested in

Write the equation of the line that passes through (-1,8) and is parallel to the graph of y = 4x - 2

NikAS [45]

Answer:

When a line is parallel to another line, they have the same slope. So far the equation would be, y=4x+b. To find the value of b, substitute the given point into the equation.

8=4(-1)+b

8=-4+b

b=12

So, the equation of the line is y=4x+12.

8 0

2 years ago

100/225 square feet of your bakery will be used as your storefront, where customers come visit. The rest kill be used for storag

Lelu [443]

The answer is 5/9. I showed a bit more work on the other post

7 0

3 years ago

Estimate and calculate <br><br> 2.7 x (-3.2)

irga5000 [103]

Answer:

- 216/25

8 16/25

8.64

Step-by-step explanation:

3 0

3 years ago

Between which two consecutive integers does 85 square lie

AnnZ [28]

Answer:

Step-by-step explanation:

9 & 10

go add the snap carmel.bratz

5 0

3 years ago

the volumes of two similar figures are 729 mm and 2744 mm if the surface area of the larger figure is 392 mm what is the surface

Stolb23 [73]

We know that
[volume of larger figure]=[scale]³*[volume of smaller figure]
scale=∛(volume of larger figure/volume of smaller figure)
scale=∛(2744/729)-----> 1.56

[surface area of the larger figure]=scale²*[<span>surface area of the smaller figure]
</span>[surface area of the smaller figure]=[surface area of the larger figure]/scale²
[surface area of the smaller figure]=[392]/1.56²----> 162 mm²

the answer is
the surface area of the smaller figure is 162 mm²

7 0

3 years ago