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Serhud [2]
3 years ago
7

Which statement is true about the circumference of a circle?

Mathematics
2 answers:
Marianna [84]3 years ago
8 0
The correct statement is C. Although it should say 'T<span>he circumference is found by multiplying π by the squared radius'.

Hope this helps.</span>
Alchen [17]3 years ago
6 0

Answer: c.

Step-by-step explanation: The circumference can be found by multiplying pi by the radius squared

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3 years ago
What is the value of cos θ given that (-2, 9) is a point on the terminal side of θ?
liq [111]

Answer:

a)  cosθ  = \frac{-2\sqrt{85} }{85}

Step-by-step explanation:

<u><em> Step(i):</em></u>-

Given point ( x , y ) = ( - 2 , 3 )

We know that the polar co-ordinates

  x = r cos θ and y = r sinθ

where   r = \sqrt{x^{2} +y^{2} }  

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<u><em>Step(ii)</em></u>:-

           x = r cos θ

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      cosθ  = \frac{-2}{\sqrt{85} } = \frac{-2}{\sqrt{85} } X \frac{\sqrt{85} }{\sqrt{85} }

       cosθ  = \frac{-2\sqrt{85} }{85}

3 0
3 years ago
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Bingel [31]

Answer:

Step-by-step explanation:

(0, 1) (4, -2)

(-2 - 1)/(4 -0) = -3/4

7 0
3 years ago
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