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Bumek [7]
3 years ago
6

The domain of y = cos x is _______.

Mathematics
1 answer:
Lana71 [14]3 years ago
6 0

ANSWER

d. The set of all real numbers

EXPLANATION

The basic cosine function ,

y =  \cos(x)

is continuous everywhere.

The function is defined for all real values of x.

The domain is the set all values of x that will make the function defined.

The domain is all real numbers.

The correct choice is D.

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Say what now?! I don’t get this please help!
Nuetrik [128]

Answer:

D)

Step-by-step explanation:

7x + 4 = 3x + 68

7x - 3x = 68 - 4

4x = 64

x = 64/4

x = 16

I Hope I've helped you.

7 0
3 years ago
Read 2 more answers
It's question B as I've done A please help
Hatshy [7]
Its easy.use cos rule.
4 0
3 years ago
Can you please help me​
Slav-nsk [51]

Answer:

C.

Step-by-step explanation:

Hi there!

To answer this, we must set it up as

3x(2x^4-12x^2+7)

Now we just use the distributive property to solve.

this becomes 6x^5-36x^3+21x

I hope this helps!

4 0
3 years ago
Need help po. Salamat
Ede4ka [16]

Answer:

1. y ≥ 100

2. y ≤ 300

3. y ≥ 20000

4. 2y ≥ 80

5. 2y ≤ 90

Step-by-step explanation:

Let y be the variable.

1. The discount is not less than 100.

If the discount (i.e y) is not less than 100, it means it is either 100 or greater than 100.

This can be written as:

y ≥ 100

2. The cost of the book is at most 300.

This implies that the cost of the book (i.e y) is either 300 or lesser.

This can be written as:

y ≤ 300

3. His monthly income is at least 20000. This simply means that his monthly income (i.e y) is 20000 or greater than 20000.

This can be written as:

y ≥ 20000

4. Twice the number is at least 80.

Let the number be y.

Twice the number y can be written as:

2y

But twice the number is at least 80.

This means that twice the number is 80 or greater than 80. This can be written as:

2y ≥ 80

5. Twice the measure of the acute angle is not more than 90 degree.

Let the angle be y.

Twice the angle can be written as:

2y

But twice the measure of the angle is not more than 90 degree. This implies that twice the angle is 90 or lesser than 90. This can be written as:

2y ≤ 90

6 0
2 years ago
The expression 937(1+x) gives the markup price of a computer, where x is the percent of the markup written in decimal form. Whic
jarptica [38.1K]
The expression is 203.422+ X
6 0
3 years ago
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