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Grace [21]
3 years ago
6

Find the area lying outside r=6cos(theta) and inside r=3+3cos(theta)

Mathematics
1 answer:
Sloan [31]3 years ago
7 0
The area bounded by the 2 parabolas is A(θ) = 1/2∫(r₂²- r₁²).dθ between limits θ = a,b... 

<span>the limits are solution to 3cosθ = 1+cosθ the points of intersection of curves. </span>
<span>2cosθ = 1 => θ = ±π/3 </span>

<span>A(θ) = 1/2∫(r₂²- r₁²).dθ = 1/2∫(3cosθ)² - (1+cosθ)².dθ </span>
<span>= 1/2∫(3cosθ)².dθ - 1/2∫(1+cosθ)².dθ </span>
<span>= 9/8[2θ + sin(2θ)] - 1/8[6θ + 8sinθ +sin(2θ)] .. </span>
<span>.............where I have used ∫(cosθ)².dθ=1/4[2θ + sin(2θ)] </span>
<span>= 3θ/2 +sin(2θ) - sin(θ) </span>

<span>Area = A(π/3) - A(-π/3) </span>
<span>= 3π/6 + sin(2π/3) -sin(π/3) - (-3π/6) - sin(-2π/3) + sin(-π/3) </span>
<span>= π.</span>
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Step-by-step explanation:

*Snarls at my own stupidity*

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2 years ago
One factor of the polynomial 3x3 + 20x2 - 21x + 88 is (x + 8). what is the other factor of the polynomial? (note: use long divis
Snezhnost [94]

The other factor of the polynomial is a. 3x2-4x+11

Given polynomial is 3x3 + 20x2 - 21x + 88 and the factor is (x+8)

We need to find another factor using long division method

So,

We will divide the polynomial by the factor to find the another factor

Therefore,

\sqrt[x+8]{3x^3+20x^2-21x+88}

Now calculating

First multiplying 3x^2 with (x+8) so , 3x^2 will be in the quotient

We get 3x^3+24x^2

simplifying the calculation for 3x^3+20x^2 and 3x^3+24x^2

We get the remainder is -4x^2-21x+88

Second we will multiply -4x with (x+8) Where -4x will be in the quotient

We get -4x^2-32x and then we will simplify the equation

We get 11x +88 as a remainder

The quotient we get is 3x^2-4x

Third we will multiply +11 with (x+8) Where +11 will be in the quotient

we get 11x+88

Simplifying the equation we get the remainder 0

So the quotient we get is  (3x2 - 4x+11)

Hence the another factor of the polynomial is  (3x2 - 4x+11)

Learn more about Long division method here

brainly.com/question/22153164

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8 0
2 years ago
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zimovet [89]

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Step-by-step explanation:

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3 years ago
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Sidana [21]

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Step-by-step explanation:

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The 100-meter dash times in the girls track meet were normally distributed with a mean of 13 seconds and a standard deviation of
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Answer:

97.68 %

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Step-by-step explanation:

5 0
3 years ago
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