1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Stells [14]
3 years ago
8

Write the complex number in polar form:

Mathematics
1 answer:
emmasim [6.3K]3 years ago
6 0

9514 1404 393

Answer:

  2√30 ∠-120°

Step-by-step explanation:

The modulus is ...

  √((-√30)² +(-3√10)²) = √(30 +90) = √120 = 2√30

The argument is ...

  arctan(-3√10/-√30) = arctan(√3) = -120° . . . . a 3rd-quadrant angle

The polar form of the number can be written as ...

  (2√30)∠-120°

_____

<em>Additional comments</em>

Any of a number of other formats can be used, including ...

  (2√30)cis(-120°)

  (2√30; -120°)

  (2√30; -2π/3)

  2√30·e^(i4π/3)

Of course, the angle -120° (-2π/3 radians) is the same as 240° (4π/3 radians).

__

At least one app I use differentiates between (x, y) and (r; θ) by the use of a semicolon to separate the modulus and argument of polar form coordinates. I find that useful, as a pair of numbers (10.95, 4.19) by itself does not convey the fact that it represents polar coordinates. As you may have guessed, my personal preference is for the notation 10.95∠4.19. (The lack of a ° symbol indicates the angle is in radians.)

You might be interested in
10 POINTS PLEAEE HELP ME
chubhunter [2.5K]
1.obtuse 2.acute 3. Right angle 4.acute
5 0
3 years ago
Read 2 more answers
You and a friend get food you have $100 the food 60.85 and the tax is $8 and you wanna leave a 20 tip how much money will you ha
Free_Kalibri [48]

Answer:

$11.15

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Find CE. <br> Show your work!
lara31 [8.8K]

The length of the chord CE is 24.46 in

To find the length of the chord CE, we solve the question using pythagoras' theorem

<h3>What is a chord?</h3>

A chord is a line segment touching two points in a circle.

<h3>What is pythagoras' theorem?</h3>

Pythagoras' theorem states that in any right angled triangle with sides a, b and c where c is the hypotenuse side, we have that

c² = a² + b²

<h3>The required triangle</h3>

Now form the diagram the radius of the circle BE forms a right angled triangle with the perpendicular to the chord, BO and the midway between the chord, OE.

BO = BD - OD

= 20 in - 5 in

= 15 in

From pythagoras,

BE² = DE² + BO²

making DE subject of the formula, we have

DE = √(BE² - BO²)

DE = √((20 in)² - (15 in)²)

DE = √(400 in² - 225 in²)

DE = √(175 in²)

DE = 13.23 cm

<h3>The length of the chord</h3>

Since the chord CE = 2DE,

So, CE = 2 × 13.23 in

= 26.46 in

So, the length of the chord CE is 24.46 in

Learn more about length of chord here:

brainly.com/question/12394106

#SPJ1

7 0
2 years ago
On a game show, a contestant randomly chooses a chip from a bag that contains numbers and strikes. The theoretical probability o
notka56 [123]
If the probability of choosing a strike is 3/10, that means that from the total items available 3 out of 10 are strikes, now, if there are 9 strikes total, this is the equation representing such result:
(3/10)(totalChips) = 9
if we solve for totalChips we have:
3(totalChips) = 9*10 = 90
totalChips = 90/3 = 30
therefore the total amount of chips in the bag is 30
4 0
3 years ago
Read 2 more answers
What is the solution to the system of equations graphed below?
Mariulka [41]

Answer:

it is (-4,8)

Step-by-step explanation:

3 0
4 years ago
Read 2 more answers
Other questions:
  • Please select the best answer from the choices provided<br> Thank you (:
    9·2 answers
  • Kyla can plant 300 trees in 1 hour
    15·1 answer
  • 2(4+2x) &gt; 5x+5<br> Solve the inequality
    11·1 answer
  • The value of a car decreases by 12% each year. what would be the annual decay factor or multiplier?
    15·1 answer
  • A bag lunch consists of a sandwich, chips, and fruit. There may be a peanut butter sandwich, a cheese sandwich, or a roast beef
    11·1 answer
  • The sum of three consecutive multiples of three are 54 more than twice the smallest number. What are the three integers?
    8·1 answer
  • ABC and ACD are both right-angled triangles.
    14·1 answer
  • Polygon ABCD goes through a sequence of rigid transformations to form polygon A′B′C′D′. The sequence of transformations involved
    14·1 answer
  • Find the distance between the points (2,1), (-3,6)
    14·1 answer
  • Help please. Look at picture and and only answer if your 100% sure. Brainliest Answer​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!