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anonymous

  • one year ago

The picture shows a portion of a river dam, what is the height, in meters of the river dam?

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    @geerky42

  3. anonymous
    • one year ago
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    do you know SOHCAHTOA?

  4. anonymous
    • one year ago
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    no i dont

  5. anonymous
    • one year ago
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    |dw:1433876092272:dw|

  6. anonymous
    • one year ago
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    Your problem has Θ = 40°, you have the adjacent side, and want to find the opposite side. Which trig function should you use?

  7. anonymous
    • one year ago
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    tan right?

  8. anonymous
    • one year ago
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    right. Try setting up the equation

  9. anonymous
    • one year ago
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    tan = \[\tan =\frac{ 40 }{ opp }\]

  10. anonymous
    • one year ago
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    thats not right i did tht wrong

  11. anonymous
    • one year ago
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    \[\frac{ 100 }{ \sin 40 }\]

  12. anonymous
    • one year ago
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    So 40° is the angle, so it's tan 40° on the left.

  13. anonymous
    • one year ago
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    and 100 is the adjacent side

  14. anonymous
    • one year ago
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    tan 40° = h/100 *where h is the variable I'm using for height

  15. anonymous
    • one year ago
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    oh okay so \[\frac{ 100 }{ \tan 40 }\]

  16. anonymous
    • one year ago
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    right?

  17. anonymous
    • one year ago
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    to get h by itself, multiply both sides by 100.

  18. anonymous
    • one year ago
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    h = 100 tan 40°

  19. anonymous
    • one year ago
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    ohh i understand it now, thats the answer h=100 tan 40 thanksman!

  20. anonymous
    • one year ago
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    you're welcome

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spraguer (Moderator)
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