What is the value of 1 – 2sin^2(105°)?

What Is The Value Of 1 2sin^2(105)?

Answers

Answer 1

Answer:

Step-by-step explanation:

1-2sin²∝=cos 2∝

1-2sin²(105)=cos(2×105)

=cos 210

=cos (180+30)

=-cos 30

[tex]=-\frac{\sqrt{3}}{2} \\[/tex]

Answer 2

The correct answer is option A which is the value of the expression is -√3/2.

What is trigonometry?

The branch of mathematics sets up a relationship between the sides and the angles of the right-angle triangle termed trigonometry.

The expression will be solved as:-

1-2sin²∝=cos 2∝

1-2sin²(105)=cos(2×105)

1-2sin²(105=cos 210

1-2sin²(105=cos (180+30)

1-2sin²(105=-cos 30

1-2sin²(105 = -√3/2.

Therefore the correct answer is option A which is the value of the expression is -√3/2.

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Related Questions

What expression is
represented in the model
below?

Answers

the answer is:

4x + 4y + 7

4x +4y + 7 because, there are 4 yellow rectangles, 4blue rectangles that have y in it and 7 of the orange squares with no variable attached

what is the square root of 10 to the second power

Answers

Answer:

10

Step-by-step explanation:

reduce the index of the radical and exponent with 2

|10|

The absolute value of any number is positive

10

Answer :

The answer is 10

2. Express each of the following percentages as a decimal.
12%​

Answers

Answer:

.12

Step-by-step explanation:

if it is out of 100% then 12% is equal to .12 from 1

Sean drank a slushy as fast as he could.
The amount of slushy left in the cup (in milliliters) as a function of time (in seconds) is graphed.
How fast did Sean drink the slushy?
A. 10ml per second
B. 1 ml per second
C. 0.8 ml per second
D. 8 ml per second

Answers

d. 8 ml per second is the answer

Sean drank slushy  8 ml per second.

The correct answer is an option (D)

What is the slope of the line?

"The slope of the line passing through points [tex](x_1,y_1),(x_2,y_2)[/tex] is,

[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]"

For given question,

From the graph, we can observe the line is passing through points         (0, 600) and (75, 0)

Let [tex](x_1,y_1)=(600,0),(x_2,y_2)=(75,0)[/tex]

The slope of the line would be,

[tex]\Rightarrow m=\frac{y_2-y_1}{x_2-x_1}\\\\\Rightarrow m=\frac{0-600}{75-0}\\\\\Rightarrow m =\frac{-600}{75}\\\\ \Rightarrow m = -8[/tex]

This means, Sean drank slushy  8 ml per second.

The correct answer is an option (D)

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Help me please I hate right and doing this uhh

Answers

Answer:

C

Step-by-step explanation:

There are many ways to figure it out but if you multiply by 20 each you'll get 40/100=40%

Answer:

c: 2/5

Step-by-step explanation

40% ÷10= 4÷2=2

100%÷10=10÷2=5

So you do 40% over 100% and divide both by 10 then simplify it and 2 goes into both 4 and 10 so you divide by 2 and get 2/5

Last week, Subway sold 602 Veggie Delite sandwiches, 935 ham sandwiches, 1,328 turkey breast sandwiches, 757 roast beef sandwiches, and 1,586 Subway Club sandwiches. Find the total number of sandwiches sold.

Answers

Answer:

Subway sold 5208 sandwiches

Step-by-step explanation:

Step 1.

It is required to calculate the total number of sandwiches sold by Subway. It sold 602 Veggie, 935 ham, 1,328 turkey breast, 757 roast beef, and 1,586 Subway Club Sandwiches.

Step 2.

Sum the amount of each sandwich sold to determine the total

A book store sells 10 cookbooks, 18 novels, and 25 children's books on
Saturday. The store sells 6 cookbooks, 12 novels, and 15 children's books on
Sunday. Which ratio is the smallest?
A. Number of novels to children's books sold on Sunday
B. Number of cookbooks to novels sold on Saturday
C. Number of novels to children's books sold on Saturday
D. Number of cookbooks to novels sold on Sunday

Answers

Answer:

D)

Step-by-step explanation:

A) Ratio of novels : children's books Sunday -> 12:15 or 4:5

B) Ratio of cookbooks : novels on Saturday ->10:18 or 5:9

C) Ratio of novels : children's books Saturday -> 18:25

D) Ratio of  cookbooks : novels Sunday -> 6:12 or 1:2

Ratios from options A) B) and C) are all larger than 1:2 (1/2 or 0.5)

100 points!+ brainlist = moving up!= friending u=awesomeness

Evaluate StartFraction 8 (6 + 5) over 2 squared EndFraction + 6(2).
22
34
56
112

Answers

Answer:

56

Step-by-step explanation:

Answer:

34

Step-by-step explanation:

Start by adding the number in the parenthesis: This gives us (8(11)/2^2) + 6(2)

Square the bottom: (8(11)/4) + 6(2)

Multiply the top of the fraction: (88/4) +6(2)

Divide 88 by 4: 22 + 6(2)

Multiply 6 and 2: 22 + 12

Add 22 and 12: 22 + 12 = 34

Answer: 34

Solve the system by elimination
2x – y=1
x + 3y – 4= 0

Answers

Did it step by step , hope it helps !

The value of x and y  for the given equation by elimination method are 1 and 1 respectively.

Elimination method for solving the system of equations;

The elimination method is the process of eliminating on of the variables in the system of linear equations using the addition or subtraction methods in conjunction with multiplication or division of coefficients of the variables.

According to the given question

We have two equations

[tex]2x -y =1...(1)[/tex]

[tex]x+3y-4=0...(2)[/tex]

Multiply equation (1) both the sides by 3

[tex]6x - 3y =3...(3)[/tex]

Adding equation (2) and (3)

[tex]6x+-3y+x+3y -4 =3\\7x =7\\x =1[/tex]

Substitute

x =1,  in either 2x -y =1 or x + 3y -4 =0

2(1) - y =1

⇒ -y = 1 -2

⇒ -y = -1

⇒ y =1

Hence, the value of x  and y is 1 and 1 respectively.

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Determine whether the statement is true or false. Explain your reasoning. "Every relation is a function."

Answers

Answer:
False


Explanation:

All functions are relations, but not all relations are functions. A function is a relation that for each input, there is only one output. Here are mappings of functions. The domain is the input or the x-value, and the range is the output, or the y-value. Hope this helps you:)

WILL GIVE BRAINLIEST AND 10 POINTS
What are the relationship between the blood type alles???

Answers

Answer:

Blood groups are inherited from both parents. ... Individuals with IAIA or IAi have type A blood, and individuals with IBIB or IBi have type B. IAIB people have both phenotypes, because A and B express a special dominance relationship: codominance, which means that type A and B parents can have an AB child.

What is the equation of a line perpendicular to -x +2=y that intersects the line at (-1,5, 3,5)?

Answers

Answer:

B

Step-by-step explanation:

slope equals 1 and y-int equals 5

click and drag like terms onto each other to simplify fully
7-1-6+4x

Answers

7-1-6+4x

7-1=6

6-6=0

0+4x

=4x

15PTS PLEASE HELP ASAP!
(dont write random answers pls)
look at the pic attached:

Answers

Answer:B if two lines are cut by a traversal, then corresponding angles are congruent.

Step-by-step explanation: the corresponding angles theorem proves this.

im sure the answer is B :)

Find the slope of the line.

Please help

Answers

Answer:

0

Step-by-step explanation:

The slope of a line that is horizontal is always 0.

Blurry picture but i really need this answered this test is worth more then half my grade.

Answers

Answer:

These are the coordinate pairs: (0,0), (2,4), (3,6), (6,12)

Step-by-step explanation:

since y=2x, you just multiply every value for x by 2, so for the x values 0, 2, 3, and 6, you would get 0, 4, 6, and 12, respectively.

A 100-ounce jug of liquid laundry detergent
can wash 64 loads of laundry. How many
loads could a 150-ounce jug of detergent
wash?

Answers

Answer:

96

Step-by-step explanation:

divide 100 and 64 by 2 than multiply both by 3

i need help please!!!!!!

Answers

Answer:

Is B☆

Step-by-step explanation:

is B b b b bb ☆☆

4g6yvyvuvvv y yvyvvtvycrxtxt

cgcycycuv

ctvyc

bjb

jbvt

crxtctvyvyvyvyv

yvh

Find the distance between the 2 points shown on the number line.
Р
Q
-10
-5
0
5
10
12
13
14
15

Answers

Answer:

It's 12 please give brainliest

Step-by-step explanation:

-6 and 6 make it 12

Answer:

its B. 13

Step-by-step explanation:

Find the slope and y-intercept of the graph of the equation. y = -6.5x + 4.7​

Answers

Answer:

Slope: -6.5

y int: 4.7

Step-by-step explanation:

AD is a diameter of circle ABCDE . Angle BAC=22° & angle ADC=60°. AE and ED are parallel lines. Find the values of w, x,y,and z

Answers

Answer:

x = 22°

w = 30°

y = 30°

z = 52°

Step-by-step explanation:

From ΔACD,

AD is the diameter and ∠ACD is the angle subtended by the diameter.

Therefore, m∠ACD = 90°

By triangle sum theorem,

m∠DAC + m∠ACD + m∠CDA = 180°

w° + 90° + 60° = 180°

w = 180 - 150

w = 30°

AB║ED and AD is a transversal line.

Therefore, m∠BAD = m∠ADE

(w + 22)° = z°

30 + 22 = z

z = 52°

Since, ∠CEB and ∠BAC are the inscribed angles subtended by the same arc BC,

Therefore, m∠CEB = m∠BAC

x = 22°

Similarly, ∠CED and ∠DAC are the inscribed angles subtended by the same arc CD,

m∠CED = m∠DAC = 30°

y = 30°


I need help asap
Less then 5 minutes

Answers

Answer:

um well he would be well rested so he would score higher than others but I'm not sure on the exact number maybe around 90-100

Distribute: 2x ( 3 + 8x) *

Answers

Answer:16x^2+6x

Step-by-step explanation:

The answer is 6x+16x2

please HELPPPPPPPPPPPPP

Answers

25.13274122.

....................

plz help me I need this!!

Answers

Answer:

B

Step-by-step explanation:

The slope of this graph which is the unit rate = 18/4 = 4.5 This graph goes through 0,0 and (4,18) and the unit rate = y /x

True or False:
The geometric meaning of the word normal is perpendicular.

Answers

Answer:

A normal is an object such as a line or vector that is perpendicular to a given object. ... If normal is 90 degree to the surface, that means normal is used in 3D. Perpendicular in that case is more in 2D referring two same entities (line-line) with 90 degree angle between them.

False No it’s not perpendicular is two lines that meet at a right angle

Would someone PLEASE help with this and explain how you got the answer I WILL MARK BRAINLIEST

Answers

Answer:2 48,39=87

Step-by-step explanation:

Answer:

DV

DE

VE

Step-by-step explanation:

Can someone check if I did this right

Answers

yea this looks correct :)

Please help me with this!​

Answers

Answer:

B. 2

Step-by-step explanation:

Answer:

I think the ans is C .............m

2. Find 110°
B
С.
95°
Pas
100 A
100
E

Answers

Answer:

55°

Step-by-step explanation:

By angle sum property of a quadrilateral :

[tex]m\angle BED = 360\degree - (110\degree + 95\degree + 100\degree) \\\\

m\angle BED = 360\degree - 305\degree \\\\

\huge \purple{m\angle BED = 55\degree}\\\\[/tex]

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