3 years ago

The radius of a circle is 1 foot what is the circle's area USE 3.14 FOR PI

Mathematics

1 answer:

BlackZzzverrR [31]3 years ago

4 0

Answer:

Step-by-step explanation:

the area of the circle:

A= 3.14 x r^2

A=3.14 x1=3.14 ft^2

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mrs_skeptik [129]

ANSWER

$r = 2 \sqrt{29} ( \cos(292 \degree) + \sin(292 \degree))$

EXPLANATION

The polar form of a complex number ,

$z = x + yi$

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$z = r( \cos( \theta) + i \sin( \theta) )$

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$r = \sqrt{ {x}^{2} + {y}^{2} }$

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$z = 4 - 10i$

$r = \sqrt{ {4}^{2} + {( - 10)}^{2} }$

$r = \sqrt{16 + 100}$

$r = \sqrt{116} = 2 \sqrt{29}$

And

$\theta= \tan^{ - 1}(\frac{ y}{x} )$

$\theta= \tan^{ - 1}(\frac{ - 10}{4} )$

$\theta= 292 \degree$

Hence the polar form is :

$r = 2 \sqrt{29} ( \cos(292 \degree) + \sin(292 \degree))$

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3 years ago

The radius of a circle is 1 foot what is the circle's area USE 3.14 FOR PI​

The radius of a circle is 1 foot what is the circle's area USE 3.14 FOR PI