2 years ago

4. Select all the ways that describe the

Mathematics

1 answer:

postnew [5]2 years ago

4 0

Answer:

all

Step-by-step explanation:

have the awnserbbbnnnnnnnnnnnn

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artcher [175]

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x/0.5 = 8/1

So x = 4.

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balu736 [363]

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mrs_skeptik [129]

The Pythagorean theorem can be used to find the length of the diagonal (d) of a square.

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3 years ago

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yanalaym [24]

Answer:

The answer is a² .

Step-by-step explanation:

You have to substitute x and y into the expression :

$let \: x = a \cos(θ) \\ let \: y = a \sin( θ)$

${x}^{2} + {y}^{2} = {(a \cosθ )}^{2} + {(a \sinθ) }^{2}$

${x}^{2} + {y}^{2} = {a}^{2}( {cos}^{2}θ) + {a}^{2} ({sin}^{2}θ)$

Next, you have to apply Basic Trigonometric Identity :

${sin}^{2} θ + {cos}^{2} θ = 1$

${x}^{2} + {y}^{2} = {a}^{2} ( {cos}^{2} θ + {sin}^{2} θ)$

${x}^{2} + {y}^{2} = {a}^{2} (1)$

${x}^{2} + {y}^{2} = { a}^{2}$

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3 years ago