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Goryan [66]
3 years ago
6

Sin^2xcos^2x=1-cos4x/8

Mathematics
1 answer:
Korolek [52]3 years ago
7 0
\sin^2x\cos^2x=\left(\dfrac{1-\cos2x}2\right)\left(\dfrac{1+\cos2x}2\right)=\dfrac{1-\cos^22x}4=\dfrac{1-\dfrac{1+\cos4x}2}4=\dfrac{2-(1+\cos4x)}8=\dfrac{1-\cos4x}8
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A railroad crew can lay 7 miles of track each day. They need to lay 203 miles of track. The length, L (in miles), that is left t
swat32

Answer:

It will take 29 days to lay the track

After 18 days the crew still has 77 miles of track left to lay

Step-by-step explanation:

203÷7

=29 days

L= 203 - 7(18)

L= 203 - 126

L= 77

7 0
3 years ago
I need help please!!
Aleksandr-060686 [28]

Answer:

1) Communism: government led by a single party often authoritarian.

2) Democracy: government that allows people to choose their leaders.

3) Socialism: government that owns goods and services. It encourages cooperation rather than competition.

4) Oligarchy: government of a few individuals usually wealthy, of certain race often authoritative rulers.

5) Monarchy: Government of one person that usually inherits it. Often inherited by gender. They can be constitutional with limited power or absolute, with unlimited power.

6) Theocracy: leader of a specific religion.

7) Totalitarianism: Government of one person without limitations of power.

8) Military Dictatorship: countries ruled by one person with absolute power.

Step-by-step explanation:

3 0
2 years ago
What's 755,082 rounded to the nearest 10,000
mihalych1998 [28]
The answer is 760,000
4 0
3 years ago
Read 2 more answers
Solve by addition method <br>3x+y=8 <br>2x-y=7
Vinil7 [7]

Answer:

(3,-1)

Step-by-step explanation:

So we have the system of equations:

3x+y=8\\2x-y=7

As directed, add straight down. The y-variable will cancel:

5x=15

Now, divide both sides by 5. The left cancels:

x=3

So x is 3.

Now, substitute 3 for x in either of the equations:

3x+y=8

Substitute 3 for x:

3(3)+y=8

Multiply:

9+y=8

Subtract 9 from both sides:

y=-1

So, our answer is: x=3, y=-1 or (3,-1).

And we are done :)

7 0
3 years ago
Micheal took his brother to the movies. Micheal paid regular price, but it cost $2 less for his brother at the child price. It c
iren [92.7K]

It cost $5 for his brother's ticket.

Step-by-step explanation:

Let,

Micheal's ticket price= x

His brother ticket price = y

According to given statement;

x+y=12    Eqn 1

y = x-2    Eqn 2

Putting value of y from Eqn 2 in Eqn 1

x+(x-2)=12\\x+x-2=12\\2x=12+2\\2x=14\\

Dividing both sides by 2;

\frac{2x}{2}=\frac{14}{2}\\x=7

Putting x=7 in Eqn 2

y=7-2\\y=5

It cost $5 for his brother's ticket.

Keywords: linear equation, substitution method

Learn more about linear equations at:

  • brainly.com/question/2747595
  • brainly.com/question/2750627

#LearnwithBrainly

8 0
3 years ago
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