Answer:
○B.
Step-by-step explanation:
Trigonometric Identities
<u>Radius Formula</u>
* Since we are talking about radii, we only want the NON-NEGATIVE root.
In this case, we will not be using the radius in our ratio, according to the trigonometric identity above because we are using the <em>tangent</em><em> </em>ratio:
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the area A of the cross section of the column is .
<u>Step-by-step explanation:</u>
Here we have , building engineer analyzes a concrete column with a circular cross section. The circumference of the column is 18π, pi meters. We need to find What is the area A of the cross section of the column .Let's find out:
We know that , Circumference of circle =
⇒
⇒
⇒
⇒
⇒
We know that area of circle =
⇒
⇒
⇒
Therefore , the area A of the cross section of the column is .
Answer:
34 root 2
Step-by-step explanation:
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