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
lisov135 [29]
3 years ago
7

Y = 3 sin2x, y = 0, 0 ≤ x ≤ π; about the x−axis

Mathematics
1 answer:
Dominik [7]3 years ago
8 0
I assume you're revolving the region with those bounds about the x-axis, and supposed to find the volume.

Via the disk method,

\displaystyle\pi\int_0^\pi(3\sin2x)^2\,\mathrm dx=9\pi\int_0^\pi\sin^22x\,\mathrm dx

Recall the half-angle identity for sine:

\sin^2t=\dfrac{1-\cos2t}2
\implies\displaystyle\frac{9\pi}2\int_0^\pi(1-\cos4x)\,\mathrm dx
=\displaystyle\frac{9\pi}2\left(x-\frac14\sin4x\right)\bigg|_{x=0}^{x=\pi}
=\dfrac{9\pi^2}2
You might be interested in
Can someone explain how u get the answer
Airida [17]

Answer:

yes

Step-by-step explanation:

i cant see da pic

6 0
2 years ago
Read 2 more answers
Ray collects cars and trucks. Over the years, the number of cars he collected is 8 less than twice
Klio2033 [76]

Answer:

Number of Trucks = 17

Step-by-step explanation:

Given:

Total number of cars and truck = 43

Find:

Number of Trucks

Computation:

Assume

Number of Trucks = x

Number of Cars = 2x - 8

Total number of cars and truck = Number of Trucks + Number of Cars

43 = x + 2x - 8

51 = 3x

x = 17

Number of Trucks = 17

6 0
3 years ago
✓-90= Ai√B<br> What is the value of A?<br> What is the value of B?
olga2289 [7]

Answer:

A = 3, B = 10

Step-by-step explanation:

\sqrt{-90}

= \sqrt{9(-1)(10)}

= \sqrt{9} × \sqrt{-1} × \sqrt{10}

= 3i\sqrt{10}

in the form Ai\sqrt{B}

with A = 3 and B = 10

5 0
2 years ago
Find the area figure below​
svlad2 [7]

Answer:

Area = 1

Step-by-step explanation:

I;ve attached my work below

Hope it helps, Let me know if you have any questions/concerns !

Have a nice rest of your day :)

5 0
2 years ago
A flower pot weighing 3 newtons is sitting on a windowsill 10 meters from the ground what is its potential energy
krek1111 [17]

Answer:

30 J

Step-by-step explanation:

W = mg = 3 N

h = 10 m

Potential Energy = mgh = 3*10 = 30 J

5 0
3 years ago
Other questions:
  • (will give brainliest)
    9·1 answer
  • Jeff and Kirk can build 75 feet retaining wall together in 10 hours. Because Jeff has more experience, he could build the wall b
    9·1 answer
  • Need help ASAP!! thank you sorry if u can’t see it good :(
    12·1 answer
  • A sample of lava has a volume of 15 ml and a mass of 47g what is its density?
    6·1 answer
  • What is 45 mi/h=__ ft/s
    15·1 answer
  • What is the value of x in the equation below?
    7·2 answers
  • PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!!!
    10·2 answers
  • 8w-8= - 4w + 16 answers please
    5·2 answers
  • The number of loaves of bread purchased and the total cost of the bread in dollars can be modeled by the equation c = 3.5b. Whic
    10·1 answer
  • NEED HELP WITH THESE QUESTIONS ASSAP
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!