Question

Someone please help me!!!! Medal will be awarded!

A barn door has two parallel bars. A support AB runs across the diagonal between the two parallel bars. The angle made by the diagonal with the parallel bar on top is 60 degrees. The distance between the two parallel bars is 9 feet.

What is the length of the support AB?

Answers:

9 by tan 60 degrees

9 sin 60°

9 cos 60°

9 by sin 60 degrees

Answer 1

use this as you given perp and have to find hyp. so use that trginometric fun which involves perp and hypt. that is sin and angle is 60 degree so it will be.
\[\sin 60=\frac{ perp }{ hyp }=\frac{ 9 }{ hypt }\]
si it will be

hypt= 9 by sin 60

Answer 2

what is perp?

Answer 3

Perpendicular side to the angle you are observing.

Answer 4

oh okay hold on!

Answer 5

Also known as Adjacent side to the angle observed.

Answer 6

any triangle has three side...the hypateneous,the perpendicular and the base..
so perp mean perpendiccular distance which is BC

Answer 7

wait now im confused

Answer 8

it is also known as opposite side..

Answer 9

i know that but im confused on the equation

Answer 10

ok i see

Answer 11

Which equation are you confused about?

Answer 12

the sin 60 one

Answer 13

\[Sin(\theta) = \frac{ Opposite }{ Hypotenuse }\]
\[Cos(\theta) = \frac{ Adjacent }{ Hypotenuse }\]
\[Tan(\theta) = \frac{ Opposite }{ Adjacent }\]

Answer 14

If we orientate when we switch angles and say the perpendicular means opposite then we can establish a way to always distinguish the sides.