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Anon25 [30]
3 years ago
15

Is the graph of g(x) =x2 - 1

Mathematics
1 answer:
IRISSAK [1]3 years ago
3 0
Cancel the 2 to get x then x-1 divided by x
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An angle is drawn in standard position passing through the unit circle at (0.643,0.766). The angle in standard position θ has a
Flura [38]
<h2>Hello!</h2>

The asnwer is: Cos50° ≈ 0.643

<h2>Why?</h2>

A unit circle is a cirgle with a radius equal of 1, knowing that,  also know the following:

The angle is drawn passing trough the unit circle at (0.643,0.766) it means that:

x=0.643\\y=0.766

So,

Cos50° ≈ 0.643

We can prove that by following the next steps:

- If it's a unit circle,here is a right triangle with hypotenuse of 1,

1^{2}=x^{2}+y^{2}

1^{2}=0.643^{2}+0.766^{2}

1^{2}=0.4134 +0.5867

1=1.0001=1

- We can determine the cosine of the angle by the following formula:

cos(\alpha)=\frac{x}{hypotenuse} \\cos(\alpha)^{-1}=cos(\frac{0.643}{1})^{-1} \\\alpha=49.98

Therefore,

Cos(α)=49.98°≈50°

Also, if there is a right triangle, according to the Pythagorean Thorem:

1^{2}=(Cos(\alpha))^{2}+(Sin(\alpha))^{2} \\Cos(50)=\sqrt{1-(Sin(50))^{2}}=0.6427

Hence,

Cos50° ≈ 0.643

Have a nice day!

3 0
3 years ago
Read 2 more answers
240 feet long by 40 feet wide what is the area of the top face of one salar arrays
AnnZ [28]

we know that

shape of solar array will be rectangular

we are given

length=240ft

width =40ft

we know that

Area=length*width

A=240*40ft^2

Area=9600ft^2............Answer

4 0
4 years ago
Read 2 more answers
Need help with this. Please
snow_lady [41]

Answer:

yes it would make a acute triangle

Step-by-step explanation:

3 0
3 years ago
4 books for $26 and 6 books for $42<br> What’s the better buy?
tester [92]

Answer:

4 books for $26

Step-by-step explanation:

4 books for $26

Take the price and divide by the number of books

$26/4 =$6.50 per book

6 books for $42

Take the price and divide by the number of books

$42/6 = $7.00 per book

The better buy is 4 books for $26

3 0
3 years ago
Find the coordinates of the reflected image.
andreyandreev [35.5K]

Answer:

see explanation

Step-by-step explanation:

Under a reflection in the x- axis

a point (x, y ) → (x, - y ), hence

F(- 1, 9) → F'(- 1, - 9)

G(- 2, 1) → G'(- 2, - 1)

H(- 7, 4) → H'(- 7, - 4)

4 0
3 years ago
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