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mihalych1998 [28]
3 years ago
5

What are the answers to these aswell mb?

Mathematics
1 answer:
docker41 [41]3 years ago
5 0

Answer:

4 is D = 23

Step-by-step explanation:

the coefficient is the number before the letter

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A ratio of 14:40 =13;?
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9.75

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What’s the value of x
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Pls help with Trigonometric
Sav [38]

The value of the given trigonometry function is 2√15/15

<h3>Half angles</h3>

Half angles are trigonometric identities used to express sine, cosine and tangent of half angles.

For instance the value of cos theta is expressed as shown below;

cosФ = cos(Ф/2+Ф/2)

cosФ = cos²Ф/2-sin²Ф/2
cosФ = cos²Ф/2-(1-cos²Ф/2)
cosФ  = 1 - 2cos²Ф/2

Given the following parameters

cosФ = -7/15

Substitute

cosФ  = 1 - 2cos²Ф/2

-7/15  = 1 - 2cos²Ф/2

-2cos²Ф/2 = -7/15 - 1

-2cos²Ф/2 = -8/15

cos²Ф/2 = 4/15
cosФ/2 = 2/√15

Rationalize

2/√15 * √15/√15

2√15/15

Hence the value of the given trigonometry function is 2√15/15

Learn more on trigonometry function here: brainly.com/question/2254074

#SPJ1

8 0
1 year ago
Students in Mr.Hill’s class were asked how many
zloy xaker [14]

asked how many....??

4 0
3 years ago
Read 2 more answers
PLEASE HELP QUICK I AM IN A RUSH
Alekssandra [29.7K]
C because it simplifies to 0=0 which proves that it has infinite solutions!
7 0
3 years ago
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