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anonymous

  • one year ago

The angle of depression from the top of the tree to the tip of the shadow is 25°. Find the height of the tree to the nearest tenth.

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  1. MrNood
    • one year ago
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    there is not enough info to answer this is there a sketch or a dimension you have missed out?

  2. Rhystic
    • one year ago
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    there is not enough information in your problem. Did they give a distance such as from the tree to the end of the depression or any lengths?

  3. MrNood
    • one year ago
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    |dw:1433947908104:dw|

  4. anonymous
    • one year ago
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    |dw:1433947938295:dw|

  5. anonymous
    • one year ago
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    sorry its a bad drawing but thats literally what it gives me

  6. Rhystic
    • one year ago
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    is that 36 degrees or 36 ' or 36 " ?

  7. anonymous
    • one year ago
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    a.16.8 feet b.18.2 feet c.23.4 feet d.39.7 feet

  8. Rhystic
    • one year ago
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    are you sure? that makes no sense. if its 36 feet its solvable but according to your diagram you have a right angle there which is 90 degrees...

  9. anonymous
    • one year ago
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    36 feet with 25 degrees im sorry i just started and im still new to all this

  10. Rhystic
    • one year ago
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    so sin is used to find length opposite of the angle in a right triangle and cos for adjacent length. (disregarding the hyp). so here you would use 36*sin(25) to yield the height of the tree.

  11. Rhystic
    • one year ago
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    if you were given the height and wanted to find the length of the shadow you would use height*(cos(25))

  12. MrNood
    • one year ago
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    no - that is not correct I think I waould assume th e36' is the length of the shadow so it is TAN 25° you want

  13. Rhystic
    • one year ago
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    yeah youre right my fault.

  14. Rhystic
    • one year ago
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    36*tan(25) my head is somewhere else sorry about that.

  15. MrNood
    • one year ago
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    |dw:1433948434496:dw|

  16. anonymous
    • one year ago
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    so i type the equation you put into the calculator correct?

  17. Rhystic
    • one year ago
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    yeah.

  18. anonymous
    • one year ago
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    so by typing in 36*tan(25 i recieved -4.80

  19. MrNood
    • one year ago
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    better still - you understand the equation and why we used tan 25 THEN you put it in your calculator

  20. anonymous
    • one year ago
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    what do you mean? im really bad at math and have a slow mind set

  21. MrNood
    • one year ago
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    for instance: it tells you the angle of depression SO how do we get the angle 25 as I drew (those are just excuses)

  22. anonymous
    • one year ago
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    we find a way to use the 36? or get rid of it?

  23. MrNood
    • one year ago
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    everyone is bad at maths until they Learn how to do it

  24. anonymous
    • one year ago
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    we all have to start somewhere i guess

  25. anonymous
    • one year ago
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    |dw:1433949341497:dw|

  26. Rhystic
    • one year ago
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    ok so there are three equations for right triangles you should keep in your head to memory. sin(angle) = opposite/hypotenuse ; cos(angle) = adjacent / hypotenuse ; and tan(angle) = opposite/adjacent. utilizing these you can solve any problem involving a right triangle if you are given one length and one angle. In this case you are given 25 degrees and the length adjacent to that angle. You are asked to find the height which is opposite to that angle thus you can use tan(angle) = opposite/adjacent solve for opposite yielding tan(angle)*adjacent = opposite or tan(25)*36 = answer. To check your answer you use cos(25)/36 = hypotenuse and then use pythagreas theorem and you should come out with the same answer for the height.

  27. anonymous
    • one year ago
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    23.4 then?

  28. MrNood
    • one year ago
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    do oyu understand the 3 functions in a right angle triangle? sin cos tan (it is not 23.4 so I think you are guessing)

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