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3 years ago

Solve ds/dt=cos(2t)+sin(t) explicitly when t=π and s = 1.

Mathematics

1 answer:

jeyben [28]3 years ago

6 0

Answer:

s = ½sin(2x) - cos(x)

Step-by-step explanation:

s = sin(2t)/2 - cos(t) + c

1 = sin(2pi)/2 - cos(pi) + c

1 = 0 - (-1) + c

1 = 1 + c

c = 0

s = ½sin(2x) - cos(x)

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Please help! Find value of x.

aniked [119]

Maybe its 18 :| but idk

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3 years ago

How many triangles can be constructed with angles measuring 80 degrees , 80 degrees and 40 degrees

daser333 [38]

Answer:

None

Step-by-step explanation:

The angles inside a triangle add to 180. If the angles are 80, 80 and 40, then they must add to 180 to form a triangle.

80+80+40 = 200

This can't be a triangle.

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3 years ago

Find the equation of a line whose slope is 1/2 and intersects negative y-axis at a distance of 7 units from the origin.

Anuta_ua [19.1K]

Answer:

Step-by-step explanation:

$y=\frac{1}{2} x-7$

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2 years ago

Read 2 more answers

The top of the Boulder Dam has an angle of elevation of 1.2 radians from a point on the Colorado River. Measuring the angle of e

Nana76 [90]

Answer:

382.925 feets

Step-by-step explanation:

The solution diagram is attached below :

Converting radian measurement to degree :

radian angle * 180/π = degree angle

1.2 * 180/π = 68.755°

0.9 * 180/π = 51.566°

Height of dam is h:

Using trigonometry :

Tan θ = opposite / Adjacent

Tan 68.755° = h / x

h = x Tan 68.755° - - - (1)

Tan 51.566° = h / (155+x)

h = (155+x) tan 51.566° - - - (2)

Equate (1) and (2)

x Tan 68.755 = (155+x) Tan 51.566

x Tan 68.755 = 155tan 51.566 + x tan 51.566

x Tan 68.755 = 195.32311 + x Tan 51.566

x Tan 68.755 - x Tan 51.566 = 195.32311

x(tan 68.755 - tan 51.566) = 195.32311

x * 1.3120110 = 195.32311

1.3120110x = 195.32311

x = 195.32311 / 1.3120110

x = 148.87307

Using :

h = x Tan 68.755

h = 148.87307 * tan(68.755)

h = 382.92539

h = 382.925 feets

5 0

3 years ago

You are really excited to have found a Puch Maxi Moped from the mid Eighties, and the spring weather is making you want to get o

AlexFokin [52]

Answer:

<u>We should add 1.2 fluid ounces of oil </u>

Correct statement and question:

You are really excited to have found a Puch Maxi Moped from the mid Eighties, and the spring weather is making you want to get out and ride it around. It doesn't run on straight gasoline, you have to mix the oil and gas together in a specific ratio of 2.4 fl. oz. of oil for every gallon of gasoline. You have 2 quarts of gas. How much oil should you add?

Source:

https://www.chegg.com/homework-help/questions-and-answers/really-excited-found-puch-maxi-moped-mid-eighties-spring-weather-making-want-get-ride-arou-q38287224

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Ratio = 2.4 fl. oz. of oil for every gallon of gasoline

Amount of gas you have = 2 quarts

2. How much oil should you add?

Let's recall that 1 liquid gallon = 4 liquid quarts, therefore:

Ratio = 2.4 fluid ounces of oil for every 4 quarts of gasoline

Replacing the with the real amount of gas we have:

Ratio = 1.2 fluid ounces of oil for every 2 quarts of gasoline )dividing by 2 the oil amount and the gas amount)

<u>We should add 1.2 fluid ounces of oil </u>

7 0

3 years ago