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Dima020 [189]
3 years ago
11

What are the solutions for the equation 2cos0+1=0 ?

Mathematics
1 answer:
Oksanka [162]3 years ago
4 0

Answer:

2cos0=-1

cos0=-1/2

proved

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Look at the graph and tell me why it is proportional or nonproportional and why?
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Answer:

I think it is not proportional because the line is supposed to go thro the middle of each dot, and some of the dots don't have a line thro the middle only on the side or not even on the dot.

Hope this helps!

Step-by-step explanation:

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2 years ago
The angle of elevation to the top of a skyscraper is measured to be 2 degrees from a point on the ground 1 mile from the buildin
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Answer:

0.034921 miles or 1843774 feet tall

Step-by-step explanation:

Using trigonometric functions we know that x=rcos(\theta) and y=rsin(\theta) where \theta=angle and r is the hypotenuse of the triangle.

First we will calculate the hypotenuse using the x equation, since we know x = 1 mile (distance from the building on the ground) we have:

x=rcos(\theta)\\\\1=rcos(2)\\\\r=\frac{1}{cos(2)} \approx. 1.0061mi

Now we will calculate the height of the building using the y equation and so:

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The building is 0.034921 miles or approximately 184.3774 feet tall.

4 0
3 years ago
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Answer:

Step-by-step explanation:

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2 years ago
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