Question

For the polar functions r = 2Cos 20, and the radial lines, graph and calculate the area of the region R inside the curve of the function

57

likes
285 views

Answer to a math question For the polar functions r = 2Cos 20, and the radial lines, graph and calculate the area of the region R inside the curve of the function

Expert avatar
Fred
4.4
120 Answers
Para graficar la función polar r = 2\cos(2\theta), primero necesitamos identificar el rango de \theta que queremos graficar. Dado que el periodo de \cos(2\theta) es \pi, podemos graficar un ciclo completo de la función tomando valores de \theta de 0 a \frac{\pi}{2}.

Para calcular el área de la región R dentro de la curva de la función, podemos usar la fórmula del área para curvas en coordenadas polares:

A = \frac{1}{2} \int_{\alpha}^{\beta} r^2 d\theta

Donde r = 2\cos(2\theta) y \alpha = 0, \beta = \frac{\pi}{2}.

Paso 1: Graficar la función polar para \theta en el rango de 0 a \frac{\pi}{2}:
r = 2\cos(2\theta)

Paso 2: Calcular el área de la región R dentro de la curva de la función:
A = \frac{1}{2} \int_{0}^{\frac{\pi}{2}} (2\cos(2\theta))^2 d\theta

A = \int_{0}^{\frac{\pi}{2}} 4\cos^2(2\theta) d\theta

Utilizando la identidad trigonométrica \cos^2(2\theta) = \frac{1 + \cos(4\theta)}{2}, tenemos:
A = \int_{0}^{\frac{\pi}{2}} 4\left(\frac{1 + \cos(4\theta)}{2}\right) d\theta

A = \int_{0}^{\frac{\pi}{2}} 2 + 2\cos(4\theta) d\theta

A = \left[2\theta + \frac{1}{2} \sin(4\theta)\right]_{0}^{\frac{\pi}{2}}

A = 2\cdot\frac{\pi}{2} + \frac{1}{2}\sin(2\pi) - 0 - 0

A = \pi

Entonces, el área de la región R dentro de la curva de la función es \pi.

\boxed{A = \pi}

Frequently asked questions (FAQs)
What is the basis of the vector space spanned by (1,0,1) and (2,-1,3)?
+
What is the domain of the logarithmic function f(x) = log x / f(x) = ln x? Express the answer in interval notation.
+
What is the measure of the angle formed when an angle bisector intersects its opposite side?
+
New questions in Mathematics
STUDENTS IN A CLASS LEARN ONLY ONE FOREIGN LANGUAGE. two-sevenths of the students learn German, half of the students learn Spanish, and the remaining six students learn Italian. what is the number of students in this class? detail your reasoning carefully.
The graph of the equation x²= 4py is a parabola with focus F(_,_) and directrix y=_____ Therefore, the graph of x²=12y is a parabola with focus F(_,_) and a directrix y=_____
The ratio of tomatoes to red apples is 2:5. If there are 20 tomaoes in the garden, how many red apples are there?
Consider numbers from 1 to 2023. We delete 3 consecutive numbers so, that the avarage of the left numbers is a whole number
Log(45)
A study reports the following final notation: F (3, 32) = 9.50, p < .05. How many total participants were involved in this study? Group of answer choices 34 32 36
form a key for your lock containing the numbers 2 2 5 8 How many different keys can you form?
A recurring sequence is one where elements repeat after completing one standard. If the sequence AB8C14D96AB8C1... is recurring its twentieth term is equal to: (A) B. (B) 8. (C) A. (D) 6. (E) D.
Use linear approximation to estimate the value of the sine of 31o.
On+January+10+2023+the+CONSTRUCTORA+DEL+ORIENTE+SAC+company+acquires+land+to+develop+a+real estate+project%2C+which+prev%C3% A9+enable+50+lots+for+commercial+use+valued+in+S%2F+50%2C000.00+each+one%2C+the+company+has+as+a+business+model+generate+ cash+flow+through%C3%A9s+of+the+rental%2C+so+47%2C+of+the+50+enabled+lots+are+planned to lease+47%2C+and+ the+rest+will be%C3%A1n+used+by+the+company+for+management%C3%B3n+and+land+control
Sabendo+que+o+tri%C3%A2ngulo+ABC+%C3%A9+ret%C3%A2ngulo+e+que+um+de+seus+%C3%A2ngulos+mede+30+quanto+mede+o+terceiro+ tri%C3%A2ngulo
find missing measure for triangle area = 48 m square base = 10m heaighy = ? m
2x-5-x+2=5x-11
A property sold for $745,000 in a co-brokered transaction. The seller has agreed to pay a 7% commission to the listing firm. The listing firm has agreed to equally split the commission with the selling firm. If the buyer’s broker will receive 8% of the selling firm’s commission, how much commission will the buyer’s broker receive? $14,900 $3725 $$37250 $18625
X^X =49 X=?
a) 6x − 5 > x + 20
If the mean of the following numbers is 17, find the c value. Produce an algebraic solution. Guess and check is unacceptable. 12, 18, 21, c, 13
An export company grants a bonus of $100,000 pesos to distribute among three of its best employees, so that the first receives double the second and the latter receives triple the third. How much did each person receive?
15=5(x+3)
5 1/9 + 2 2/3