3 years ago

2.

Mathematics

2 answers:

vredina [299]3 years ago

7 0

Answer is
The answer is A:13.7

Lunna [17]3 years ago

3 0

Answer:

Step-by-step explanation:

13.7

You might be interested in

WILL GIVE BRAINLEST ANSWER IF ANSWERED IN THE NEXT 24 HRS Express the complex number in trigonometric form. -5i

trasher [3.6K]

Answer:

$z=5\left(\cos \left(\dfrac{3\pi}{2}\right)+i\sin \left(\dfrac{3\pi}{2}\right)\right)$

Step-by-step explanation:

If a complex number is z=a+ib, then the trigonometric form of complex number is

$z=r(\cos \theta +i\sin \theta)$

where, $r=\sqrt{a^2+b^2}$ and $\tan \theta=\dfrac{b}{a}$ , $\theta$ is called the argument of z, $0\leq \theta\leq 2\pi$ .

The given complex number is -5i.

It can be rewritten as

$z=0-5i$

Here, a=0 and b=-5. $\theta$ lies in 4th quadrant.

$r=\sqrt{0^2+(-5)^2}=5$

$\tan \theta=\dfrac{-5}{0}$

$\tan \theta=\infty$

$\theta=2\pi -\dfrac{\pi}{2}$ $[\because \text{In 4th quadrant }\theta=2\pi-\theta]$

$\theta=\dfrac{3\pi}{2}$

So, the trigonometric form is

$z=5\left(\cos \left(\dfrac{3\pi}{2}\right)+i\sin \left(\dfrac{3\pi}{2}\right)\right)$

4 0

3 years ago

Read 2 more answers

1. Rachel has a fair pyramid with four faces and a spinner with three equal-sized colored sections. What is the probability that

Masja [62]

Answer:

29%

Step-by-step explanation:

33% - 25% =8%

4 0

3 years ago

In terms of pie, what is the area of the circle?

murzikaleks [220]

The answer is D because it has the larger number and value. So that is the area of the circle.

3 0

2 years ago

Read 2 more answers

Knowing that 8<br> Solve in this format: <br> _

kifflom [539]

What? This isn’t a question

4 0

3 years ago

Suppose A and B are independent events. If P(A) = 0.6 and P(B) = 0.85, what is P(A and B)? A. .34 B. .51 C. .17 D. .68

s2008m [1.1K]

Answer:

0.51

Step-by-step explanation:

Mathematically, for two individual events;

P(AnB) = P(A) * P(B)

P(A n B) = 0.6 * 0.85 = 0.51

8 0

3 years ago

Read 2 more answers