Mathematics College

On interval 0 ≤ x < 2π, where are the x-intercepts of y = cos(2x)?
A. pi/2 and 3pi/2
B. 0, pi, and 2pi
C.pi/2, pi, and 3pi/2
D.pi/2, 3pi/4, 5pi/4, and 7pi/4

On Interval 0 X &lt; 2, Where Are The X-intercepts Of Y = Cos(2x)?A. Pi/2 And 3pi/2B. 0, Pi, And 2piC.pi/2,

Answers

Answer 1

Answer:

Choice D:

π/2, 3π/4, 5π/4, and 7π/4

Step-by-step explanation:

correct on edg

Answer 2

The solution of the equation y = cos(2x) will be π/4, 3π/2, 5π/4, and 7π/4. Then the correct option is D.

What is the solution to the equation?

The allocation of weights to the important variables that produce the calculation's optimum is referred to as a direct consequence.

The definition of simplicity is making something simpler to achieve or grasp while also making it a little less difficult.

The equation is given below.

y = cos(2x)

The x-intercept of the equation in the interval 0 ≤ x < 2π will be given as,

y = 0

cos(2x) = 0

cos 2x = cos (n + 1) π/2

2x = (n + 1)π / 2

x = (n + 1)π / 4

x = π/4, 3π/2, 5π/4, 7π/4

The solution of the equation y = cos(2x) will be π/4, 3π/2, 5π/4, and 7π/4. Then the correct option is D.

More about the solution of the equation link is given below.

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Related Questions

Solve the rational equation 4 divided by x equals quantity 3 times x plus 2 end quantity divided by x squared, and check for extraneous solutions.

Answers

Answer:

x = 2

Step-by-step explanation:

Step 1: Write equation

[tex]\frac{4}{x}=\frac{3x+2}{x^2}[/tex]

Step 2: Solve for x

Cross multiply: [tex]4x^2=x(3x+2)[/tex]Distribute x: [tex]4x^2=3x^2+2x[/tex]Subtract 3x² on both sides: [tex]x^2=2x[/tex]Subtract 2x on both sides: [tex]x^2-2x=0[/tex]Factor: [tex]x(x-2)=0[/tex]Solve: [tex]x = 0, 2[/tex]

Step 3: Check

Plug in x to verify it's a solution.

Substitute: [tex]\frac{4}{0}=\frac{3(0)+2}{0^2}[/tex]Evaluate: undef (cannot divide by 0)

Substitute: [tex]\frac{4}{2}=\frac{3(2)+2}{2^2}[/tex]Evaluate: [tex]2=\frac{6+2}{4}[/tex]Evaluate: [tex]2=\frac{8}{4}[/tex]Evaluate: [tex]2=2[/tex]

ANGLES IN TRIANGLES WORKSHEET

Answers

Answer:

x = 26

Step-by-step explanation:

90 + 52 + unknown angle = 180

142 + unknown angle = 180

unknown angle = 38

unknown angle + 116 + x = 180

38 + 116 + x = 180

154 + x = 180

x = 26

Step-by-step explanation:

Click here

Thanks guys :)

Mwhehe

F(x)=2x+2 solve the inverse when x=4

Answers

The answer is f= 5/2

Solve and show your work.

12-[2 + 6 ÷ (10 - 2³)]

Answers

Answer:

7

Step-by-step explanation:

[tex]2^{3} = 8[/tex]  Plug 8 in: 12 - [2 + 6 ÷ (10 - 8)]10 - 8 = 2Plug 2 in: 12 - [2 + 6 ÷ (2)]6 ÷ 2 = 3Plug 3 in: 12 - [2 + 3]2 + 3 = 5Plug 5 in: 12 - 512 - 5 = 7

I hope this helps!

Please help thank you so much I mark as brainliest​

Answers

The coordinates of point R are (-8, 7)

Use the multiplier method to increase £72 by 12%
You must show your working.

Answers

Answer:

£80.62

Step-by-step explanation:

100+12%=112%

112/100= 1.12

1.12*£72 =£80.62

Quick I need help pls

Answers

Answer:

361

Step-by-step explanation:

Suppose set A contains 336 elements and the total number elements in either set A or set B is 642. If the sets A and B have 78 elements in common, how many elements are contained in set B?

Answers

Answer:

math

Step-by-step explanation:

Find an equation of the line perpendicular to the graph of 10x - 5y = 8 that passes through the point at (-4, 7).
y = 2x + 5
a.
C.
1
•x-5
y =
b.
d.
1
y = -x + 5
2
1
y = --X + 5
Please select the best answer from the choices provided
A
B
ОООО
C
D

Answers

Answer:

Step-by-step explanation:

you want a line with slope = -1/2

So, using the point-slope form of the line,

y-7 = -1/2 (x+4)

y = -1/2 x + 5

Hard to tell what your choices are ...

Which Property of Addition does 9 + 0 = 9 illustrate ? A. Distributive Property B. Identity Property C. Zero Property D. Commutative Property​

Answers

Answer:

B. Identity Property

How do i graph y=4x + 5​

Answers

Answer:

it would look like the picture below

Step-by-step explanation:

Solve for x

12 = 10

18 = x

Answers

Step-by-step explanation:

12=10 I think you have to add 10+2and then you get 12.

18=×you will have to multiply 18 by a number probably by 10 or 12

x=15
this is because 12:10 which is also 6:5.
then you multiply 6 by 3 and get 18. so then you multiply 5 by 3 and get 15
i hope this helped

Which relation is not a function?

{(1,5), (2,6), (3,6), (4,7)}
{(4,7, (2,1), (-3,6), (3,4)}
{(-1,6), (1,3), (2,5), (1,7)}
{(-1,2), (0,5), (5,0), (2,-1)}

Answers

Answer: C

Step-by-step explanation:

The X value repeats itself

Step-by-step explanation: In order for a function not to be a relation,

each x-coordinate must correspond to more than one y-coordinate.

Notice that in third relation, the 1 pairs with a 3

in one case  and it pairs with a 7 in the other case.

Since each x-coordinate pairs with more than one y-coordinate,

this relation is not a function but the other ones are functions.

Which of the following functions has a graph that passes through the origin? Select all that apply.
A. power; y equals x superscript n baseline
B. root; y equals Root Index n Start Root x End Root
C. reciprocal; y equals Start Fraction 1 over x End Fraction
D. exponential; y equals b superscript x baseline

Answers

Answer: a and b

power and root

What is the product?
8
-1
-4.
-5
9
-32
4
O
20
-36
32
-4
-20

Answers

AnswerC

Step-by-step explanation:

Solve for N.
5
6
15
N

Answers

10? Not 100% sure though!
5x3=15
so 6x3=18

so

n= 18

(x7) - 3 = 4
Find what X = ?

Answers

Answer:

1

Step-by-step explanation:

add 3 to 4

(1x7)= 7

You have solved a radical equation. What should you do to check whether your proposed solution is​ correct?

You should check your proposed solution in any of the equations you found while looking for the solution.

You​ don't need to check whether your proposed solution is correct. You know you followed the proper​ method, so it should be fine.

You should check the proposed solution in the original equation.

You should check the proposed solution in the back of the book because it is always right.

Answers

Answer:You should check the proposed solution in the original equation.

Step-by-step explanation:

The radical is the symbol that is used to represent the root in the expression n√x. The correct option is C.

What is a radical?

The radical is the symbol that is used to represent the root in the expression n√x.

You have solved a radical equation. Now, to check whether your proposed solution is​ correct You should check the proposed solution in the original equation.

Hence, the correct option is C.

Learn more about the Radical:

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Round the number to the place of the underlined digit. 42.76 The rounded number is​

Answers

Answer:

what am i supposed to be rounding to

Step-by-step explanation:

if i was rounding to the tenths it would be 42.8

Twenty point question!

Answers

Answer:

yes

no

Step-by-step explanation:

i hope im correct please give me brainliest and some feedback if im correct or not :)

7th grade math help me plzzzz

Answers

Answer:

35

Step-by-step explanation:

Answer-
32cm
Hope that helped

What is the solution of z + 5 = 6

Answers

Answer:

1

Step-by-step explanation:

Answer:

1

Step-by-step explanation:

z + 5 = 6

collecting Like Terms

(Alphabet On the Left hand , Numbers on the Right hand)

z = 6 - 5

while A Poaitive number Crosses Equality Sign it Chnages Sign

z = 1

Why is 18:3 and 6:1 equivalent ratios

Answers

Answer:

Because if you multiply 6 three times, it comes out to be 18.

So basically, 6 x 3 = 18

To be sure, 18 ÷ 6 = 3

So, 18:3 = 6:1

18:3 and 6:1 are equivalent ratios because those are equivalent fractions.

What is the ratio?

Suppose that we've got two quantities with measurements as 'a' and 'b'

Then, their ratio(ratio of a to b) a:b

or   [tex]\dfrac{a}{b}[/tex]

We usually cancel out the common factors from both the numerator and the denominator of the fraction we obtained. Numerator is the upper quantity in the fraction and denominator is the lower quantity in the fraction).

Suppose that we've got a = 6, and b= 4, then:

[tex]a:b = 6:2 = \dfrac{6}{2} = \dfrac{2 \times 3}{2 \times 1} = \dfrac{3}{1} = 3\\or\\a : b = 3 : 1 = 3/1 = 3[/tex]

Remember that the ratio should always be taken of quantities with same unit of measurement. Also, ratio is a unitless(no units) quantity.

Explanation;

If we get the factors of the first ratio, we will see that;

18: 6 and 3, and 18 and 1

3: 3 and 1

Hence, if we display the ratios in fractions;

18/3 = 6/1

And then we write them in factors, we will get;

3x6/3x1 = 6/1

Simplifying;

3/3 x 6/1 = 2/1 x 3/1 = 1/6

Therefore, 18:3 and 6:1 are equivalent ratios.

Learn more about ratio here:

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Help whats the answer to this Help plz

Answers

Answer:

3/5

Step-by-step explanation:

when you multiply powers by a zero it = 0 so you would just end up with 3/5

need help again please i’m sorry...

Answers

Answer:

The slope is -1/5

Step-by-step explanation:

y = mx +b is in slope intercept form

m is the slope and b is the y intercept

y = -1/5x -1

The slope is -1/5 and the y intercept is -1

Answer:

Step-by-step explanation:

The slope is -1/5

What is the y-intercept of y = 2x + 5

Answers

Answer:

5

Step-by-step explanation:

Which equation is an identity?

3(x – 1) = x + 2(x + 1) + 1
x – 4(x + 1) = –3(x + 1) + 1
2x + 3 = 2 x plus 3 equals StartFraction one-half EndFraction left-parenthesis 4 x plus 2 right-parenthesis plus 2.(4x + 2) + 2
StartFraction one-third EndFraction left-parenthesis 6 x minus 3 right-parenthesis equals 3 left-parenthesis x plus 1 right-parenthesis minus x minus 2.(6x – 3) = 3(x + 1) – x – 2

Answers

Answer:

c. 2x + 3 = 1/2(4x+2)+2

Step-by-step explanation:

Hope this helpss!!

Answer:

2x + 3 = 1/2(4x+2)+2

Step-by-step explanation: on edge

Explain how you could use either multiplication or division to solve the same equation.

Answers

Answer:

Multiply By Decimal

Step-by-step explanation:

If you multiply a number by a decimal you get the same outcome that you would if you would have divided it

fiona has a box of chocolates the box contains 60 chocolates she eats 1/5 of the chocolates she gives 32 chocolates away what is the fraction of the chocolates does she have left answer in simplest form​

Answers

Answer:

4/15

Step-by-step explanation:

Simon began a weight-loss program. He loses weight every two weeks. His weight, in pounds, t months after he began the weight-loss program, is shown by the following expression.

210(0.94)2t

Which statement below best describes the base, 0.94?

A. Simon's weight before he beganm the weight-loss program

B.the rate which Simon loses weight

C. the monthly decrease in Simon's weight

D. the numbers of times Simon has lost weight since he began the weight-loss program

Answers

pretty sure b. not 100% sure.
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