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
dolphi86 [110]
3 years ago
15

Etermine two pairs of polar coordinates for the point (2, -2) with 0° ≤ θ < 360°.

Mathematics
1 answer:
Jet001 [13]3 years ago
8 0

To convert from rectangular to polar we will use these 2 formulas:

r^2=x^2+y^2 and

tan\theta=\frac{y}{x}.

The r value found serves as the first coordinate in our polar coordinate, and the angle serves as the second coordinate of the pair. We are told to find 2. Since the r value will always be the same (it's the length of the hypotenuse created in the right triangle we form when determining our angle theta), the angle is what is going to be different in our coordinate pairs. We use the x and y coordinates from the given rectangular coordinate to solve for the r in both our coordinate pairs.

r^2=2^2+ -2^2 which gives us an r value of 2\sqrt{2}. That's r for both coordinate pairs. Now we move to the angle. Setting up according to our formula we have

tan\theta =\frac{-2}{2} =-1.

This asks the question "what angle(s) has/have a tangent of -1?". That's what we have to find out! Since the tangent ratio is y/x AND since it is negative, it is going to lie in a quadrant where x is negative and y is positive, AND where x is positive and y is negative. Those quadrants are 2 and 4. In QII, x is negative so the tangent ratio is negative here; in QIV, y is negative so the tangent ratio is negative here as well. Now, if we type inverse tangent of -1 into our calculators in degree mode, we get that the angle that has a tangent of -1 is -45. Measured from the positive x axis, -45 does in fact go into the fourth quadrant. However, since the inverse tangent of -1 is -45, we also have a 45 degree angle in the second quadrant. Those are reference angles, mind you. A 45 degree angle in QII has a coterminal angle of 135 degree; a 45 degree angle in QIV has a coterminal angle of 315. If you don't understand that, go back to your lesson on reference angles and coterminal angles to see what those are. So our polar coordinates for that rectangular coordinate are

(2\sqrt{2},135) and

(2\sqrt{2},315)

You might be interested in
A news report suggested that an adult should drink a minimum of 4 pints of water per day.
spin [16.1K]

9514 1404 393

Answer:

  448

Step-by-step explanation:

(4 pt/da)×(7 da/wk)×(16 oz/pt) = 448 oz/wk

That would be 448 fluid ounces per week.

3 0
3 years ago
Determine the pattern rule for the following sequence of numbers: 2,6,10,14
Morgarella [4.7K]

Answer:

Adding by 4 each time

Step-by-step explanation:

3 0
2 years ago
Which is an equation of the line that
Alex Ar [27]
Answer; D) y=-3x+13
4 0
3 years ago
the case of napkins contained 45 packs with a total of 10,125 napkins. each napkin contained the same number of napkins. write a
Pavlova-9 [17]
You would need to do 10,125/45 = n, and in which case we just solve. 
10,215/45=227, so there are 227 napkins in each box.


Hope this helps and have a nice day:)
7 0
2 years ago
PLZ ANSWER! ILL GIVE YOU BRAINIEST IF YOU ANSWER IN 2
V125BC [204]

Answer:

-4;-4

Step-by-step explanation:

these would be the coords because each of the lines represents 2 units

6 0
2 years ago
Other questions:
  • I'm better at writing than I am at math
    8·2 answers
  • How many square units are in an office that is 18 units by 8 units?
    7·1 answer
  • The complement of an angle is 53°. What is the measure of the angle?
    12·1 answer
  • Please help with clear explanation
    12·1 answer
  • In this arithmetic sequence the difference between each pair of consecutive terms is 1/2 Find the next term in the sequence expr
    14·1 answer
  • Please help me i need help with this please give me the answer
    14·1 answer
  • 3/4k + 3/8k = 1/2<br> solve for k please
    7·1 answer
  • Simplify: -3x2 + 5x -22 + 4x2 - 9x
    7·1 answer
  • The following is an example of
    12·1 answer
  • Over the last three evenings, Linda received a total of 83 phone calls at the call center. The second evening, she received four
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!