What should be the height of a flagpole where a 20 feet long ladderreaches 20 feet below the top of the flagpole (The angle of elevation ofthe top of the flagpole at the foot of the ladder is 60°.)?20 feet30 feetА.В.40 feet20v2 feetC.D.Given a triangle ABC, which among the following shows the Laws ofCosine?i. (AC)? = (AB) +(BC)? - 4(AB) (BC) cos Aii. (BC) = (AB)² + (AC)? - 4(AB) (AC) cos B(BC)2+(AC)-(AB)%3D%3Diii. cos C =(AC)(BC)OA.i and iiB. ii and iiiC. i and iiiD. i, il, and ii

Given: The length of the ladder is 20 feet long.

What should be the height of a flagpole where a 20 feet long ladder reaches 20 feet below the top of the flagpole (The angle of elevation of the top of the flagpole at the foot of the ladder is 60°.)?

What should be the height of a flagpole where a 20 feet long ladder reaches 20 feet below the top of the flagpole (The angle of elevation of the top of the flagpole at the foot of the ladder is 60°.)?

Trigonometry (MindTap Course List)

8th Edition

ISBN:9781305652224

Author:Charles P. McKeague, Mark D. Turner

Publisher:Charles P. McKeague, Mark D. Turner

Chapter7: Triangles

Section7.1: The Law Of Sines

Problem 52PS: Gina is standing near a building and notices that the angle of elevation to the top of the building...

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Question

What should be the height of a flagpole where a 20 feet long ladder
reaches 20 feet below the top of the flagpole (The angle of elevation of
the top of the flagpole at the foot of the ladder is 60°.)?
20 feet
30 feet
А.
В.
40 feet
20v2 feet
C.
D.
Given a triangle ABC, which among the following shows the Laws of
Cosine?
i. (AC)? = (AB) +(BC)? - 4(AB) (BC) cos A
ii. (BC) = (AB)² + (AC)? - 4(AB) (AC) cos B
(BC)2+(AC)-(AB)
%3D
%3D
iii. cos C =
(AC)(BC)
OA.i and ii
B. ii and iii
C. i and iii
D. i, il, and ii

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