2 years ago

I need help with questions 9

Mathematics

1 answer:

azamat2 years ago

4 0

Answer:

Step-by-step explanation:

You might be interested in

Which of the following names the figure in the diagram below?

Inessa05 [86]

Answer:

Step-by-step explanation:

its the only one that make sense

6 0

2 years ago

Round 3.691 to the nearest tenth.

Alja [10]

3.691 rounded by the nearest tenth is 3.7

5 0

2 years ago

Read 2 more answers

Consider w=sqrrt2/2(cos(225°) + isin(225°)) and z = 1(cos(60°) + isin(60°)). What is w+ z expressed in rectangular form?

SVETLANKA909090 [29]

Answer:

Option (3)

Step-by-step explanation:

w = $\frac{\sqrt{2}}{2}[\text{cos}(225) + i\text{sin}(225)]$

Since, cos(225) = cos(180 + 45)

= -cos(45) [Since, cos(180 + θ) = -cosθ]

= - $\frac{\sqrt{2}}{2}$

sin(225) = sin(180 + 45)

= -sin(45)

= - $\frac{\sqrt{2}}{2}$

Therefore, w = $\frac{\sqrt{2}}{2}[-\frac{\sqrt{2}}{2}+i(-\frac{\sqrt{2}}{2})]$

= $-\frac{2}{4}(1+i)$

= $-\frac{1}{2}(1+i)$

z = 1[cos(60) + i(sin(60)]

= $[\frac{1}{2}+i(\frac{\sqrt{3}}{2})$

= $\frac{1}{2}(1+i\sqrt{3})$

Now (w + z) = $-\frac{1}{2}(1+i)+\frac{1}{2}(1+i\sqrt{3})$

= $-\frac{1}{2}-\frac{i}{2}+\frac{1}{2}+i\frac{\sqrt{3}}{2}$

= $\frac{(i\sqrt{3}-i)}{2}$

= $\frac{(\sqrt{3}-1)i}{2}$

Therefore, Option (3) will be the correct option.

3 0

2 years ago

Read 2 more answers

PLEASE HELP ME WITH THIS PROBLEM:

Andru [333]

Answer:

(4,3)

Step-by-step explanation:

The solution of two lines is where they intersect

3 0

2 years ago

A 3-column table with 3 rows. Column 1 has entries Scores, Mean, M A D. Column 2 is labeled Robin with entries (99, 108, 102, 10

german

Answer:

B.6

Step-by-step explanation:

I did the assignment good luck <3

5 0

1 year ago