anonymous
  • anonymous
The picture shows a portion of a river dam, what is the height, in meters of the river dam?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
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anonymous
  • anonymous
@geerky42
anonymous
  • anonymous
do you know SOHCAHTOA?

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anonymous
  • anonymous
no i dont
anonymous
  • anonymous
|dw:1433876092272:dw|
anonymous
  • anonymous
Your problem has Θ = 40°, you have the adjacent side, and want to find the opposite side. Which trig function should you use?
anonymous
  • anonymous
tan right?
anonymous
  • anonymous
right. Try setting up the equation
anonymous
  • anonymous
tan = \[\tan =\frac{ 40 }{ opp }\]
anonymous
  • anonymous
thats not right i did tht wrong
anonymous
  • anonymous
\[\frac{ 100 }{ \sin 40 }\]
anonymous
  • anonymous
So 40° is the angle, so it's tan 40° on the left.
anonymous
  • anonymous
and 100 is the adjacent side
anonymous
  • anonymous
tan 40° = h/100 *where h is the variable I'm using for height
anonymous
  • anonymous
oh okay so \[\frac{ 100 }{ \tan 40 }\]
anonymous
  • anonymous
right?
anonymous
  • anonymous
to get h by itself, multiply both sides by 100.
anonymous
  • anonymous
h = 100 tan 40°
anonymous
  • anonymous
ohh i understand it now, thats the answer h=100 tan 40 thanksman!
anonymous
  • anonymous
you're welcome

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