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nasty-shy [4]
3 years ago
9

If p(a) contain 8 elements then set a contain which element

Mathematics
2 answers:
marissa [1.9K]3 years ago
6 0

Answer:

3 elements

because 2^3=8

MariettaO [177]3 years ago
3 0

Answer:

3 elements

because 2^3=8

Step-by-step explanation:

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In triangle ABC, AC=13, BC=84, and AB=85. Find the measure of angle C
sergiy2304 [10]

Given:

In triangle ABC, AC=13, BC=84, AB=85.

To find:

The measure of angle C.

Solution:

Law of Cosines:

\cos C=\dfrac{a^2+b^2-c^2}{2ab}

\cos C=\dfrac{BC^2+AC^2-AB^2}{2(BC)(AC)}

Substituting the given values, we get

\cos C=\dfrac{(84)^2+(13)^2-(85)^2}{2(84)(13)}

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Taking cos inverse on both sides, we get

C=\cos^{-1}(0)

C=90^\circ

Therefore, the measure of angle C is 90 degrees.

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3 years ago
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Andrews [41]


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Answer:

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