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
OverLord2011 [107]
3 years ago
15

Convert the Cartesian equation x 2 + y 2 + 2y = 0 to a polar equation.

Mathematics
1 answer:
Kisachek [45]3 years ago
3 0
R2(<span>cos2</span>ϕ−<span>sin2</span>ϕ)−2rcosϕ=0<span><span>r2</span>(<span>cos2</span>⁡ϕ−<span>sin2</span>⁡ϕ)−2rcos⁡ϕ=0</span>

<span><span><span>r2</span>cos<span>(2ϕ)</span>−2rcosϕ=0</span><span><span>r2</span>cos⁡<span>(2ϕ)</span>−2rcos⁡ϕ=<span>0

Now </span></span></span> divide through by <span><span>r≠0</span><span>r≠0</span></span> and get

<span><span>rcos<span>2ϕ</span>−2cosϕ=0</span><span>rcos⁡<span>2ϕ</span>−2cos⁡ϕ=0</span></span>

or

<span><span>r=2<span><span>cosϕ</span><span>cos<span>2ϕ</span></span></span></span><span>r=2<span><span>cos⁡ϕ</span><span>cos⁡<span>2<span>ϕ</span></span></span></span></span></span>

You might be interested in
Sketch the graphs using 3 points that belong to it. a y = 3x + 2
aliina [53]

The graph is attached

Hope this helps

3 0
3 years ago
Read 2 more answers
3. Identify the following as true or false. For those that are false, explain why they are false.
harkovskaia [24]

Answer:

a:false

b:true

c:true

Step-by-step explanation:

a:the sum of all the probabilities in the distribution must be equal to one.

My apologies if any are wrong.

4 0
3 years ago
Pls help and show workings <br> (If you don’t know the answer please don’t respond)
raketka [301]

Answer:

the required postulate which should be used here to make the triangles congruent is

C. ASA , okay

Step-by-step explanation:

because, one side and one angle of both triangles are equal and one of angles of the both triangles are vertically opposite angles , hence they are also equal , so we get an angle, a side and one another angle equal to corresponding side and angles of other triangles , so required postulate is C. ASA

I hope it helped

8 0
3 years ago
Read 2 more answers
Please help me answer this.
saul85 [17]

Answer:

it's not 16/,13 ; )

Step-by-step explanation:

5 0
2 years ago
Is a percent a number?
mars1129 [50]
Yes, percent is a number.
7 0
3 years ago
Read 2 more answers
Other questions:
  • At a speed of 45 yards per minute, a 120 pound swimmer burns 420 calories per hour and a 172 pound swimmer burns 600 calories pe
    12·1 answer
  • You earn 7.50 per hour to help your uncle in his shop you earn 33.75 write and solve an equation to find how many hours you work
    5·1 answer
  • How do you solve by elimination/linear combination. <br>a. 3x+4y=17 <br> 5x-4y=7
    11·1 answer
  • What is the probability that the individual purchased a small cup? a cup of decaf coffee?
    12·1 answer
  • It’s a half gallon of paint covers one 1/12th of a wall, then how many quarts of paint are needed for the entire wall?
    6·2 answers
  • Two triangles with the same corresponding side lengths will be congruent is known as the ?
    11·2 answers
  • Help now now the other 2 are Wednesday and Thursday
    11·1 answer
  • What is a Parrel line?
    12·1 answer
  • (5, 14) and (18,3)? Helppppppppp
    8·1 answer
  • Can you figure this out? Math kills me!
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!