someone please help!!!!!! trigonometry- trig equations!!!

Someone Please Help!!!!!! Trigonometry- Trig Equations!!!

Answers

Answer 1

Answer:

1. 0, 2 π , π , 2 π/3 , 4 π/3

2. 7 π/6 , 11 π/6

Step-by-step explanation:

1. we want to find the value of theta

Let us represent theta by x for ease of documentation

So we have ;

sin 2x + sin x = 0

Mathematically;

sin 2x = 2sinxcosx

So;

2 sin x cos x + sin x = 0

sin x (2 cos x + 1) = 0

sin x = 0

or

2cos x + 1 = 0

x = arc sin (0)

within the given range;

x = theta = 0 , 2 π , π

For;

2 cos x + 1 = 0

2cos x = -1

cos x = -1/2

cos x = -0.5

x = arc cos (-0.5)

x = 2 π/3 , 4 π/3

2. cos 2 x = 1 + sin x

Mathematically;

cos 2 x = 1-2 sin^2x

let sin x = y

1-2y^2 = 1 + y

y = -2y^2

1 = -2y

y = -1/2

y = -0.5

sin x = y

sin x = -0.5

x = arc sin (-0.5)

x = 7 π/6 , 11 π/6


Related Questions

I am timed here! Please help! Answer only if you know the question. Else please don't.

What is the value of [3.6]

A: 3

B: 3.5

C: 3.6

D: 4

Answers

Answer: 3

Step-by-step explanation: [ 3.6 ] represents the greatest integer function [ x ]

If x is an integer use that integer

If x is not an integer use the next smaller integer

[ 3.6 ] is not an integer, hence

[ 3.6 ] = 3

What is the domain of this relation?

Answers

Answer:

{-3, 3, 5, 9}

Step-by-step explanation:

The domain is simply the inputs (x) used in the function.

Answer:

{-3,3,5,9} this is answer

Solve this please, and show the work

Answers

Answer:

6677766666

Step-by-step explanation:

5tettrhfhyyf was a good relationship is a different person and then use it for the same thing to do in the same thing as possible but you should not be afraid of the person is not a bad person than the other person than the difference between the difference and what you want and you know it would

Solve for x.
x/5 = 8/9

Answers

Answer:

x = 40/9

Explanation:

5x/5 = 8 * 5/9

x = 40/9

Select all the correct answers

Which equations have a greater unit rate than the rate represented in the table?

Answers

C,D,E






Is the correct answer

Answer:

y=7/9x

Step-by-step explanation:

Find 4 consecutive odd integers whose sum is 456.

Answers

Answer:

The answer will be 111,113,115,117

Step-by-step explanation:

hope this helps okkeol :]

Answer: 4 consecutive odd numbers are 111, 113, 115 and 117.

Step-by-step explanation:

Is 30 a reasonable estimate of a quotient for 91,766 ÷ 288?
answer if you know please

Answers

Answer:

300 would be

Step-by-step explanation:

Answer:

No, around 300 would be reasonable.

Step-by-step explanation:

Someone please help.

Answers

Answer:

SA = 74.4 square yards

V = 32.7 cubic yards

Step-by-step explanation:

formula for SA for square pyramid: Area of Base + Area of 4 Triangles

SA = 3² + 4[(3 x 10.9) ÷ 2]

    = 9 + 4(16.35)

    = 9 + 65.4

formula for Volume for square pyramid: 1/3 · Area of Base · Height

V = 1/3 · 9 · 10.9

   = 3 × 10.9

     = 32.7

NEED HELP ON #1 PLEASE ASAP!!!

Answers

Answer:

-11/8

Step-by-step explanation:

-1 3/8 , x=-1.375

HELPP
what term does NOT describe the figure?

- concave
- hexagon
- polygon
- regular

Answers

The term “regular”does not describe the figure. Answer: regular

A triangle has angle measurements of 54°, 52°, and 74°. What kind of triangle is it?​

Answers

Answer:

Acute triangle.

Step-by-step explanation:

Since all angles in the triangle is less than 90°, it is an acute triangle.

Plz help I am desperate lol

Answers

Question # 7

Given two points

(0, 0)(3, 3)

Determining the slope of the line passing through the points (0, 0) and (3, 3)

(x₁, y₁) = (0, 0)

(x₂, y₂) = (3, 3)

Using the formula

Slope = m =  [y₂ - y₁] /  [x₂ - x₁]

                =  [3 - 0] / [3 - 0]

                = 3 / 3  

                = 1

Thus, the slope of the line = m = 1

Question # 8

Given two points

(1, 3)(5, 5)

Determining the slope of the line passing through the points (1, 3) and (5, 5)

(x₁, y₁) = (1, 3)

(x₂, y₂) = (5, 5)

Using the formula

Slope = m =  [y₂ - y₁] /  [x₂ - x₁]

                =  [5 - 3] / [5 - 1]

                = 2/4  

                = 1/2

Thus, the slope of the line = m = 1/2

Question # 9

Given two points

(4, 4)(5, 3)

Determining the slope of the line passing through the points (4, 4) and (5, 3)

(x₁, y₁) = (4, 4)

(x₂, y₂) = (5, 3)

Using the formula

Slope = m =  [y₂ - y₁] /  [x₂ - x₁]

                =  [3 - 4] / [5 - 4]

                = -1 / 1  

                = -1

Thus, the slope of the line = m = -1

Tap on photo please!

Answers

Answer:

300 in^2+(whatever the tip is)

Step-by-step explanation:

Area of a rectangle=l*w

A=12*25

A=300

300 in^2

(This does not include the triangle tip of the pencil)

I think you forgot to show the measurements for the triangle tip of the pencil.

the formula for finding that is:

Area of a triangle=1/2*h*w

Which is the best description for this graph?
Someone Please help me :)

Answers

The answer would be the second one, the graph is decreasing everywhere

Answer: the graph is decreasing everywhere

How many rectangles do you get if you fold a paper 3 times.

Answers

You can fold your paper on one, two, or more folds, but only on the folds we've already made. You can't make any new folds.

Find the equation of the line which passes through (2,4) with a slope of 1/2​

Answers

Answer: the answer is y=1/2x+3

Step-by-step explanation:

Hopes this helps !! Message me if explanation is needed !!!

The equation of the line which passes through (2,4) with a slope of 1/2​ is  [tex]y = \frac{x}{2} +3[/tex].

What is a slope-intercept form?

Y = mx + b is the slope-intercept form of the equation of a straight line. In the equation y = mx + b, m is the slope of the line and b is the intercept. X and y represent the distance of the line from x-axis and y-axis, respectively. The value of b is equal to y when x = 0, and m shows how steep the line is.

Given

Slope m = 1/2

Point (x, y) = (2, 4)

Equation of line which passes through a point (x, y) with a slope of m is

y = mx + b

Substitute the values

⇒ [tex]4=\frac{1}{2}(2)+b[/tex]

⇒ 4 = 1 + b

⇒ b = 4 - 1

⇒ b = 3

Substitute m = 1/2 and b = 3 in equation (1)

[tex]y = \frac{1}{2}(x) +3[/tex]

⇒ [tex]y = \frac{x}{2} +3[/tex]

Hence, the equation of the line which passes through (2,4) with a slope of 1/2​ is  [tex]y = \frac{x}{2} +3[/tex].

Find more information about slope-intercept form here

https://brainly.com/question/2419445

#SPJ2

bob is twice as old as ralph. three years ago the sum of their ages was 45. what are their ages now?

answer using a let statement

Answers

Answer:

Were they both 45? I'm kinda confused on that part, but I think Ralph would be 48 and Bob would be 50

Step-by-step explanation:

Answer:

34 and 17

Step-by-step explanation:

Bob = B

Ralph = R

B=2R

B-3+R-3=45

B+R-6=45

+6         +6

B+R=51

Substitute B for 2R

2R+R=51

3R=51

R=17

2(17)=34

so B is 34 and R is 17

Need help please look

Answers

Answer:

The area is 285.1 mi^2

Step-by-step explanation:

Here, we want to find the area of the larger sector

Mathematically, that would be;

theta/360 * pi * r^2

= 270/360 * 3.142 * 11^2

= 285.1 mi^2

Anyone know the answer?!

Answers

Answer:

A.

Step-by-step explanation:

4x-(-5x)=9x

-6y-2y=-8y

13-5=8

So, the answer is 9x+8y=8

(hope this helps!)

what 1x0 -p1s yyyyrr

Answers

0.

anything multiplied by 0 = 0.

Answer:

87

Step-by-step explanation:

1x0=97x1x0xratio=87

Solve for d.
2 = 2(d - 7)

Answers

Answer:

should be 6to make is one so you can multiply it by 1 to get the same number

Step-by-step explanation:

Answer:

D = 8

Step-by-step explanation:

distribute

2 = 2d - 14

add 14 to both side

16 = 2d

divide both sides by 2

8 = d

d = 8

can I get brainliest ?

1 cubic meter =___ million cubic cm

Answers

I believe it’s 1,000,000 I think I don’t really know I’m sorry

PLEASE ASNWER ASASP!!!!!!!!!!!! i do give be bairlest i dont be lying

Answers

Answer:

30 miles.

Step-by-step explanation:

She drove 50/5 = 10 miles in January.

Therefore she drove 3*10 = 30 miles in February.

What is the range of the following numbers:

12,20,18,25,6

Answers

Answer:

19

Step-by-step explanation:

You need to find the biggest and smallest number; 25,6

Then you subtract 6 from 25

25-6=19

I hope this helps!!!!!!!

Answer:

19

Step-by-step explanation:

The range is the difference between the highest and the lowest number

So 6, 12, 18, 20, 25 and 25-6 = 19

Factor this expression.
3х^2 - 6x

Answers

3x(x-2) is the correct answer

Unit 6 similar triangles homework 2 similar figures

Answers

Answer:

1. Angles: <F=<J, <H=<H, <G=<K

Sides: FG/JK, GH/KH, FH/JH

2. 1/4 3. 5/2 4. X=12 5. 122.5 units 6. x=8; y=35 7. X=3 8. x=25 9. x=12 10. x=15 11. X=14 12. x=13

Step-by-step explanation:

2. 4/8 =1/4

3. 10/4=5/2

4. 5x=60(x=12)

5. 7(35)/2: 245/2= 122.5 units

6. x/28= 6/21: 21x=168: x=8

7. 49/14= 9(x+1)/(x+5): 49(x+5)=9(x+1)+14: 49x+245=126x+14: 245-14=126x-49x: 231=77x: x=3

8. 52/91=x+3/2x1: 52(2x-1)= 91(x+3): 104x-52=91x+273: 13x=325: x=25

9. 5x-3/3x+2= 60/40: 60(3x+2)= 40(5x-3): 200x-120=180x+120: 200=180x+120: 20x=240: x=12

10. 168x-280=160x-60: 8x-120: x=15

11. 12/x+1= 32/3x-2: 12(3x-2)= 32(x+1): 36x-24=32x+32: 4x=56: x=14

12. x+4/2x-7= 51/57: 57(x+4)= 51(2x-7): 57x +228=102x-357: -45x = -585: x=13

Write 32 as a product of it's prime factors

Answers

Answer:

All factors of 32 are 1, 2, 4, 8, 16, and 32. Therefore, these are the common factors of 32.

Step-by-step explanation:

Answer:

2 x 2 x 2 x 2 x 2

Step-by-step explanation:

Prime factors are factors that can only factor down to itself and 1.

For example, prime factors can include, but are not limited too:

1, 2, 3, 5, 7, 11, etc.

In this case, you are trying to factor 32.

First, divide 2 (a prime factor) from 32:

32/2 = 16

Next, divide another 2 from 16:

16/2 = 8

Then, you can divide another 2:

8/2 = 4

And finally, another 2:

4/2 = 2

In this case, your prime factorization of 32 is:

32 = 2 x 2 x 2 x 2 x 2, or [tex]2^{5}[/tex]

~

15 4/7 - 11 ⅖=???????

Answers

Answer:

mixed fraction= 4 6/35 . exact form= 146/35

Step-by-step explanation:

Solve for x : 8x = 96

Answers

Answer:

x=12

Step-by-step explanation:

8x=96

8x/8=96/8

x=12

Hope this helps!

25/4=25/2a =2b=c. A=. B=. C=. answer is 2,3,8

Answers

Answer:

Ohhh fancy Smart im not that smart LOL

Step-by-step explanation:

Have A Wonderful Day !!

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