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Bad White [126]
3 years ago
10

HELP ASAP ILL GIVE BRAINLY

Mathematics
1 answer:
zaharov [31]3 years ago
3 0

Answer: C

Step-by-step explanation:

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Prove this identity using the product-to-sum identity for sin... sin^2 x=(1-cos(2x))/(2)
Simora [160]

Answer:

sin²x = (1 - cos2x)/2 ⇒ proved down

Step-by-step explanation:

∵ sin²x = (sinx)(sinx) ⇒ add and subtract (cosx)(cosx)

(sinx)(sinx) + (cosx)(cosx) - (cosx)(cosx)

∵ (cosx)(cosx) - (sinx)(sinx) = cos(x + x) = cos2x

∴ - cos2x + cos²x = -cos2x + (1 - sin²x)

∴ 1 - cos2x - sin²x = (1 - cos2x)/2 ⇒ equality of the two sides

∴ (1 - cos2x) - 1/2(1 - cos2x) = sin²x

∴ 1/2(1 - cos2x) = sin²x

∴ sin²x = (1 - cos2x)/2

4 0
3 years ago
What is true about open-end credit? OA It is not typically used for a single purchase but for many purchases over a period of ti
Nitella [24]

Answer:

Option B

Step-by-step explanation:

Open end credit 's biggest example is our credit card

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Option B is correct

7 0
1 year ago
A model car is 3 3/4 inches long.using a scale of 1/2 inch=2 feet,find the actual length of the car
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Answer:

14.25 because for every 1/2 inch, the car is 2 feet.

Step-by-step explanation:

8 0
3 years ago
What is the estimate of 5.26 ➕ 9.75?
Lelechka [254]
5.26 + 9.75
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7 0
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