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Finger [1]
3 years ago
15

Choose 1 answer: A. 6 B. 6squareroot3 C. 12 D. 18 E. 24

Mathematics
1 answer:
Maksim231197 [3]3 years ago
6 0

Answer:

C

Step-by-step explanation:

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I don't know this can someone help me?
Gemiola [76]

Answer:

513.247

Step-by-step explanation:

6 0
3 years ago
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Please answer correctly !!!!!!! Will mark 50 points !!!!!!!!!!!!!!!!
Anastasy [175]
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3 years ago
Over the interval [0, 2π), what are the solutions to cos(2x) = cos(x)? Check all that apply.
valentinak56 [21]

Answer:

Step-by-step explanation:

given the expression;

cos(2x) = cos(x)

According to trig identity;

cos(2x) = cos(x+x)

cos(2x) = cos x cos x - sinx sinx

cos(2x) = cos²(x)-sin²(x)

cos(2x) = cos²(x)-(1-cos²x)

cos(2x) = cos²(x)+cos²x-1

cos(2x) = 2cos²(x)-1

2cos²(x)-1 = cos(x)

let P = cosx

2P²-1 = P

2P²-P-1 = 0

Factorize;

2P²-2P+P-1 = 0

2P(P-1)+1(P-1) = 0

2P - 1 = 0 and P-1 = 0

P = 1/2 and 1

cosx = 1/2 and cos x = 1

x = arccos 1/2

x = π/3

Also;

x = arccos1

x = 0

Hence the value of x are 0 and  π/3

Also the angle = π+ π/3 = 4π/3

The angles are 0, π/3 and 4π/3

4 0
3 years ago
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You host a party at your house at the end of it you have 0.5 of a liter of soda left how many millimeters do you have?
Aloiza [94]
We Know, 1 liter = 1000 milliliter 
so, 0.5 liter would be = 1000 × 0.5 = 500 milliliter

In short, Your Answer would be 500 mL

Hope this helps!
4 0
3 years ago
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I need help with 5,6,7 please
AlladinOne [14]

Answer:

see explanation

Step-by-step explanation:

the arc length of a circle is calculated as

arc = circumference of circle × fraction of circle

(5)

circumference (C) is calculated as

C = 2πr ( r is the radius )

here diameter = 12 , then r = 12 ÷ 2 = 6

C = 2π × 6 = 12π ≈ 37.7 m ( to the nearest tenth )

(6)

JK = 2πr × \frac{75}{360}

    = 2π × 7 × \frac{5}{24}

    = 14π × \frac{5}{24}

    = \frac{14\pi (5)}{24} ≈ 9.2 in ( to the nearest tenth )

(7)

7.5 = 2πr × \frac{120}{360}

7.5 = 2πr × \frac{1}{3} ( multiply both sides by 3 to clear the fraction )

22.5 = 2πr ( divide both sides by 2π )

r = \frac{22.5}{2\pi } ≈ 3.6 ft

   

7 0
2 years ago
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