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4 years ago

Suppose the radius of a circle is 8 units. what is its circumference

Mathematics

1 answer:

klio [65]4 years ago

6 0

Answer:

$\large\boxed{C=16\pi\approx50.24}$

Step-by-step explanation:

The formula of a circumference of a circle:

$C=2\pi r$

r - radius

We have <em>r = 8</em>. Substitute:

$C=2\pi(8)=16\pi$

$\pi\approx3.14\to C\approx(16)(3.14)=50.24$

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Hi please help me thanksss<br>pls provide workings too thanks :)

anygoal [31]

Step-by-step explanation:

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Class 11

>>Maths

>>Trigonometric Functions

>>Trigonometric Equations

>>Solve for x: sin x + sin 2x...

Question

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Solve for x:sinx+sin2x+sin3x=cosx+cos2x+cos3x in the interval 0≤x≤2π.

Medium

Solution

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We write the given equation as

(sinx+sin3x)+sin2x=(cosx+cos3x)+cos2x

or 2sin2xcosx+sin2x=2cos2xcosx+cos2x

or sin2x(2cosx+1)=cos2x(2cosx+1)

or (sin2x−cos2x)(2cosx+1)=0

∴sin2x−cos2x=0 or 2cosx+1=0

If sin2x−cos2x=0, then tan2x=1,

Hence 2x=nπ+π/4

or x=(4n+1)

.(1)

If 2cosx+1=0, then cosx=−1/2 (2)

∴x=2nπ±

2π

or x=

6n±2

We seek values of x in the interval 0≤x≤2π

In this interval (1) gives

x=π/8,5π/8,9π/8,13π/8. (n=0,1,2,3)

and (2) gives x=2π/3,4π/3. (for n=0,1)

Thus we get the answer

x=π/8,5π/8,2π/3,9π/8,4π/3,13π/8.

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3 years ago

Solve this<br> Will mark as brainliest

Elina [12.6K]

Step-by-step explanation:

11+11+9 equals 30 just do the math it simple

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3 years ago

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Lady bird [3.3K]

Answer:

1a) Obtuse

1b) Alternate inner angles

1c) x = 101 degrees

2a) Obtuse

2b) Alternate outer angles

2c) x = 147 degrees

Step-by-step explanation:

I hoped these helped. If possible, may I have brainliest :)

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3 years ago

Is a triangle with the side lengths 15, 36, and 39 a right triangle?

Alex73 [517]

Answer:

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Step-by-step explanation:

8 0

3 years ago

Find the diameter of a circle that has an area of 254.34mm2

zvonat [6]

To find the diameter, divide the area(254.34) by pi(3.1415) and then square the quotient

$\frac{254.34}{3.1415} = 80.95$
$\sqrt{80.95} = 8.99$
That is the radius now just times that by 2 so 2 x 8.99 = 17.98

Now I have a felling the might be wanting 18 because 8.99 is so close to 9 and this is also true for 80.95. They probably want 80.95 = 81, which the square root of that is 9, which is the radius and if you times that by 2 the diameter would equal 18

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3 years ago

Suppose the radius of a circle is 8 units. what is its circumference​

Suppose the radius of a circle is 8 units. what is its circumference