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Afina-wow [57]
2 years ago
13

Use the product-to-sum identities to rewrite the following expression as a sum or difference.

Mathematics
1 answer:
PtichkaEL [24]2 years ago
3 0
Answer:

= cos4x

Explanation:

cosAcosB = [cos(A-B)+cos(A+B)]

Given: 2cos(2x)cos(2x)

= 2[cos(2x-2x)+cos(2x+2x)]

= 2cos4x^2
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3 years ago
Help wanted can someone help me and give me a short understanding of this
Citrus2011 [14]
Y = 104°
z = 24

Angle y° and (5z - 44)° are linear pairs, meaning that the two measures together will add up to 180°.
To solve for z, know that (5z - 44)° and 76° are vertical angles, meaning that both angles are the same.
So simply set them equal to each other to find z:
5z - 44 = 76
5z = 76 + 44
5z = 120
z = 24

Now to solve for y, remember that since (5z - 44)° and 76° are vertical angles, they are the same, meaning you can denote (5z - 44)° as simply 76°. Like I said earlier, y and 76° are a linear pair so simply subtract 76 from 180 to find y:
180 - 76 = 104°
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3 years ago
Why doesn't an elephant smoke?
snow_tiger [21]

Answer:

Because it can't

Step-by-step explanation:

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2 years ago
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if a triangular sail has a vertical height of 83 ft and horizantal length of 40 ft, what is the area of the sail?
Irina18 [472]

Answer:

A = 1660 ft^{2}

Step-by-step explanation:

Area of the sail or a triangle is base times height

A = \frac{1}{2}(b x h)

Base is 40 ft (horizontal length)

Height is 83 ft (vertical height)

A = \frac{1}{2}(b x h)

A = \frac{1}{2}(40 x 83) =  \frac{1}{2}(3320) = 1660 ft^{2}

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2 years ago
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