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a_sh-v [17]
2 years ago
14

Find the area enclosed by the graphs of y = sin x, y = cos x, x = 0, and x = 2. Sketch a graph.

Mathematics
1 answer:
mars1129 [50]2 years ago
6 0

Answer:

1.34 (3 sf)

Step-by-step explanation:

To find the area between 2 curves:

\int\limits^a_b {(top-bottom)} \, dx

As these 2 curves intersect, we have to first calculate where they intersect, then work out the area between the curves BEFORE and AFTER the point of intersection, as the "top" and "bottom" curves change after the point of intersection (see attached graph).

   sin(x) = cos(x)

⇒ tan(x) = 1

⇒ x = \frac{1}{4} \pi

So the curves intersect at x=\frac{1}{4} \pi (between x = 0 and x = 2)

To calculate the area between the 2 curves, x=0 and x=\frac{1}{4} \pi:

\int\limits^a_b {(top-bottom)} \, dx=\int\limits^\frac{\pi}{4}_0 {(cos(x)-sin(x))} \, dx=\sqrt{2}-1

Then to calculate the area between the 2 curves, x=\frac{1}{4} \pi and x=2:

\int\limits^a_b {(top-bottom)} \, dx=\int\limits^2_\frac{\pi}{4} {(sin(x)-cos(x))} \, dx=0.92106...

Therefore, the total area = \sqrt{2} -1+0.92106...=1.335276534...

(Please Brainliest if helped - thanks!)

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3 years ago
Jake is building a fence around his property. He wants the perimeter to be no more than 100 feet. He also wants the length to be
emmasim [6.3K]

Answer:

C. 20 feet

Step-by-step explanation:

Let x = width

Let y = length

If the length is at least 10 feet longer than the width:

⇒ x + 10 ≤ y

⇒ x ≤ y - 10

If the perimeter is to be no more than 100 ft:

⇒ 2x + 2y ≤ 100

⇒ x + y ≤ 50

⇒ x ≤ 50 - y

Equate the equations for x and solve for y:

⇒ y - 10 = 50 - y

⇒ 2y = 60

⇒ y = 30

Substitute found value of y into one of the inequalities for x:

⇒ x ≤ 30 - 10

⇒ x ≤ 20

Therefore, the maximum possible width of the fence is 20 feet.

8 0
2 years ago
Three vertices of parallelogram WZXY are W(-5, 2), X(2, 4) and Z(-7, -3). Find the coordinated of the vertex, Y.
Dominik [7]

Answer:

Y = (4,9)

Step-by-step explanation:

Given

W(x_1,y_1) = (-5, 2)

Z(x_4,y_4) = (-7, -3)

X(x_2,y_2) = (2, 4)

Required

Find Y

To do this, we make use of the mid-point formula

i.e.

M = \frac{1}{2}(x_n+x_m,y_n+y_m})

WX and ZY are the diagonals of the parallelogram.

The mid-point of WX is:

M = \frac{1}{2}(-5+2,2+4)

M = \frac{1}{2}(-3,6)

The mid-point of ZY is:

M = \frac{1}{2}(-7+x,-3+y)

Equate both values of M

\frac{1}{2}(-3,6) = \frac{1}{2}(-7+x,-3+y)

Multiply both sides by 2

(-3,6) = (-7+x,-3+y)

By comparison:

-7 + x = -3

-3 + y = 6

-7 + x = -3

x = 7 -3

x = 4

-3 + y = 6

y = 6 +3

y = 9

Hence:

Y = (4,9)

3 0
2 years ago
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