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padilas [110]
3 years ago
6

2sinxcosx=sinx in the interval of [0,2pi]

Mathematics
1 answer:
Trava [24]3 years ago
5 0
Use the double angle function sin2x = 2sinxcosx.

2sinxcosx + sinx = 0

For the first part of the problem, consider the solutions on the interval where sinx = 0

x = 0, pi

Now consider the solutions where sinx does NOT equal zero.

2sinxcosx + sinx = 0

2sinxcosx = - sinx

2cosx = - 1

cosx = - 1/2

x = 2pi/3, 4pi/3
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3 years ago
Beth drives 200 miles in 4 hours.
Dmitrij [34]

Answer:

26mph

Step-by-step explanation:

18 miles at 36mph will take 30 minutes and 26 × 7 is 3 h 30 min

3 0
3 years ago
FREE POINTSSSSSS<br> 1+3=
pickupchik [31]

Answer: 4

Step-by-step explanation:

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3 0
3 years ago
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Find an equation of the line through (3,7) and parallel to y=3x-1
iren2701 [21]

Answer:

y = 3x -2

Step-by-step explanation:

If the line is parallel, that means it has the same slope. The given equation had a slope of 3, so the new line must also have a slope of 3.

You can plug the given coordinates into the slope-intercept form with a slope of 3 to find your answer.

y = m*x + b

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-2 = b

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7 0
4 years ago
Please help me out ?!
Paraphin [41]
To find the surface area of this figure, we simply have to add up the individual areas of the shapes that make up the figure.

Surface area = 4(area of triangle) + area of square
Surface area = 4 ( 1/2 * base * height) + side^2
Surface area = 4( 1/2 * 6 * 7) + 6^2
Surface area = 4 (3 * 7) + 36
Surface area = 4(21) + 36
Surface area = 84 + 36
Surface area = 120 cm^2

Hope this helps!
4 0
3 years ago
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