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3 years ago

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1 answer:

dimulka [17.4K]3 years ago

4 0

Nolur acil lütfen yalvarırım sana da

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Prove the identity sin4x=2sin2xcos2x

Musya8 [376]

There is a trig identity called the sum of 2 angles for sin its<span>
sin(a+b)=sin(a)cos(b)+cos(a)(sin(b)
</span>
You will need to use it. So in your question split the 4x in 2 equal parts 2x and 2x
<span>
</span><span>sin(4x)=sin(2x+2x)

</span>Now using the expansion above you will get

<span>sin(2x+2x)=sin(2x)×cos(2x)+cos(2x)×sin(2x)

</span>And it will simplify to

<span><span>2sin(2x)cos(2x)

I hope this helps you! Good luck :)</span></span>

5 0

3 years ago

Read 2 more answers

Simplify this algebraic expression completely.

RoseWind [281]

Step-by-step explanation:

6x-4(x+3)

6x-4x-12

2x-12

So, option b is correct.

I hope it helped u

stay safe stay happy

3 0

3 years ago

Read 2 more answers

madeline can decorate 100 cookies in 2 hours. if she continues at this rate,how many cookies can she decorate in 5 hours

SSSSS [86.1K]

Madeline can decorate 250 cookies in 5 hours.

Step-by-step explanation:

Given,

Number of cookies decorated in 2 hours = 100 cookies

Ratio of cookies to time = 100:2

Let,

x be the number of cookies decorated in 5 hours

Ratio of cookies to time = x:5

Using proportion;

Ratio of cookies to time :: Ratio of cookies to time

$100:2::x:5$

Product of mean = Product of extreme

$2*x=100*5\\2x=500\\$

Dividing both sides by 2

$\frac{2x}{2}=\frac{500}{2}\\x=250$

Madeline can decorate 250 cookies in 5 hours.

Keywords: proportion, division

Learn more about division at:

#LearnwithBrainly

5 0

4 years ago

Express 220 as the product of its prime factors. Write the prime factors in ascending order and give your answer in index form.

kogti [31]

220
/     \
2     110/       \
2      55/       \
5      11/       \
11      1

3 0

3 years ago

A plane has 360 total seats, which are divided into economy class and business class. For every 13 seats in economy class, there

Vinil7 [7]

y - seat

x - total seats

Economy: y=x/13

Business: y=x/5

8 0

3 years ago