3 years ago

Give few sentence in Bengali

Mathematics

1 answer:

nevsk [136]3 years ago

7 0

Not a maths question?

You might be interested in

Which of the following is a third root of the given complex number.

Leokris [45]

Answer:

The correct option is C.

Step-by-step explanation:

The given complex number is

$z=64(\cos[\frac{\pi}{7}]-i\sin[\frac{\pi}{7}])$

We need to find the third root of the given complex number.

$z^{\frac{1}{3}}=(64(\cos[\frac{\pi}{7}]-i\sin[\frac{\pi}{7}]))^{\frac{1}{3}}$

$z^{\frac{1}{3}}=64^{\frac{1}{3}}(\cos[\frac{\pi}{7}]-i\sin[\frac{\pi}{7}])^{\frac{1}{3}}$

$z^{\frac{1}{3}}=4(\cos[\frac{\pi}{7}]-i\sin[\frac{\pi}{7}])^{\frac{1}{3}}$

De moivre's theorem:

$(\cos\theta+i\sin\theta)^n=\cos n\theta+i\sin n\theta$

where, n is an integer.

Using de moivre's theorem, we get

$z^{\frac{1}{3}}=4(\cos[\frac{\pi}{7}\times \frac{1}{3}]-i\sin[\frac{\pi}{7}\times \frac{1}{3}])$

$z^{\frac{1}{3}}=4(\cos[\frac{\pi}{21}]-i\sin[\frac{\pi}{21}])$

Therefore the correct option is C.

6 0

3 years ago

Read 2 more answers

I need to know the answer quickly.

alisha [4.7K]

4,7, second bubble for the word part

5 0

2 years ago

What does 7,124 ÷ 26 equal to?

Paha777 [63]

274

hope that helps

btw i used long division

8 0

2 years ago

What is the length of BC¯¯¯¯¯ ?

adell [148]

X + 9 = 2x - 8
2x - x = 9 + 8
x = 17

BC = x = 17

answer
17 units

3 0

3 years ago

Read 2 more answers

Gabriel drives 60 kilometers in one hour. If he drives at the same speed, how many kilometers can he drive in 2.50 hours?

Harlamova29_29 [7]

sheeesh im struggling with the same

4 0

3 years ago

Give few sentence in Bengali​

Give few sentence in Bengali