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Fiesta28 [93]
3 years ago
13

Write the expression as the sine, cosine, or tangent of an angle.

Mathematics
2 answers:
elena55 [62]3 years ago
5 0

Answer:

\sin (8x)=\sin (9x) \cos (x) - \cos (9x)\sin (x)

Step-by-step explanation:

Given : Expression \sin (9x) \cos (x) - \cos (9x)\sin (x)

To write : The given expression as the sine, cosine, or tangent of an angle?

Solution :

The given expression is in the form \sin A\cos B-\cos A \sin B

Using trigonometric identity,

\sin (A-B)=\sin A\cos B-\cos A \sin B

Substituting, A=9x , B=x

\sin (9x-x)=\sin (9x) \cos (x) - \cos (9x)\sin (x)

\sin (8x)=\sin (9x) \cos (x) - \cos (9x)\sin (x)

Therefore, The given expression is in the sin form sin(8x).

Georgia [21]3 years ago
3 0

Answer:

sin 8x

Step-by-step explanation:

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3 years ago
Y=x7<br><br><br> Please help I really confused
tigry1 [53]

Answer:

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Step-by-step explanation:

Well I guess if you want to change up the equation you can do 7 * X = Y

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3 years ago
Shaylee has 77 pennies. She will trade in the pennies to get nickels.
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54.85 rounded to the nearest 1/10th percent
Iteru [2.4K]

Answer:

54.9

Step-by-step explanation:

You always round up if its 0.5 or anything .5

54.58 broken down:

The 5 is the Tens place

The 4 is the Ones place

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The 5 is the Hundredths place.

:)  Hope this helps! Please mark brainliest! :)

8 0
3 years ago
A G.P has its 3rd term and 7th term as 45 and 3645 respectively. what is the product of its 2nd and 4th
Ede4ka [16]

Answer:

2,025

Step-by-step explanation:

Given:

Third term ar² = 45

Seventh term ar⁶ = 3,645

Find:

ar x ar³

Computation:

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So,

ar x ar³

(5)(3) x (5)(3)³

2,025

3 0
3 years ago
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