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2 years ago

7

What's a integer numbers

1 answer:

Vlad [161]2 years ago

8 0

Answer:

Step-by-step explanation:

The set of integers consists of zero ( ), the positive natural numbers ( , , , …), also called whole numbers or counting numbers , and their additive inverses (the negative integers , i.e., −1, −2, −3, …). The set of integers is often denoted by a boldface Z ( ) or blackboard bold mathbb (Unicode U+2124 ℤ) standing for the German word Zahlen ( , numbers ).

-Hope this helps

-GoldenWolfX

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dmitriy555 [2]

see the attached figure to better understand the problem

we have that

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Step 1

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we know that

in the right triangle ABC

$cos (A)=(AC/AB)\\AC=AB*cos(A)$

substitute the values in the formula

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Step 2

<u>Find the value of BC</u>

we know that

in the right triangle ABC

Applying the Pythagorean Theorem

$AB^{2} =AC^{2}+BC^{2}\\ BC^{2}=AB^{2} -AC^{2}$

substitute the values

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Step 3

<u>Find the value of BD</u>

we know that

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Applying the Pythagorean Theorem

$BD^{2} =DC^{2}+BC^{2}$

substitute the values

$BD^{2} =2^{2}+11.76^{2}$

$BD=11.93\ units$

therefore

<u>the answer is</u>

the length of BD is 11.93 units

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