3 years ago

Please I really need the answer of this question!!!

Mathematics

1 answer:

julia-pushkina [17]3 years ago

8 0

2nd option is the correct answer
sofia is correct.

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Prove the identity with steps.

Sav [38]

Remember that a double angle formula for cosine is
$\cos(2x)=\cos^{2}x-\sin^{2}x$

So
$\cos^{2}(2x)-\sin^{2}(2x)=\cos(4x)$
$\rightarrow \cos^{2}(2x)-\sin^{2}(2x)=\cos(2*2x)$
$\rightarrow \cos^{2}(2x)-\sin^{2}(2x)=\cos^{2}(2x)-\sin^{2}(2x)$

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2 years ago

Three of the thirty computers are out of service (not working). What percent are working?

AveGali [126]

Answer:

Percentage of computers working equals:

90%

Step-by-step explanation:

Three of the thirty computers are out of service.

Number of computers working=30-3=27

Total computers=30

Percentage of working computers=

= 90%

Hence, Percentage of computers working is:

90%

3 0

2 years ago

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Elan Coil [88]

Answer:

1) 2x^4/343

2) 2x^6/225

3) 2x^12/25

4) 5x^20/16807

Step-by-step explanation:

Hope this helps!

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2 years ago

Daniel wants to save money. The ratio of the amount of money in his savings account to the amount of money in his checking accou

Serhud [2]

Answer:

Step-by-step explanation:

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2 years ago

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Which of the following sets shows all the numbers from the set {1, 2, 3, 4} that are part of the solution to the inequality 7x +

gtnhenbr [62]

3 and 4 would both be corrent because one is smaller is 2 would make it equal

3 0

2 years ago