Question

MEDAL +FAN

The picture shows a barn door:



What is the length of the support AB?

Answer 1

.

Answer 2

use sin
\[\sin45=\frac{ 7 }{ x }\]

\[x=\frac{ 7 }{ \sin45 }\]
simplify that

Answer 3

im confused can you show me?

Answer 4

ok...this is how it looks like

do you agree up to there?

Answer 5

yes

Answer 6

\[\sin \Theta =\frac{ Opposite }{Hypotenuse }\]
Right?

Answer 7

yes

Answer 8

so the opposite side of sin 45 would be 7
\[\sin45=\frac{ 7 }{ x }\]
We are looking for x
multiply both sides by x
\[x(\sin45)=7\]
divide both sides by sin45
\[x=\frac{ 7 }{ \sin45 }\]
now continue