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pineapple31

  • 4 years ago

Two birds sit at the top of two different trees 57.4 feet away from one another. The distance between the second bird and a bird watcher on the ground is 49.6 feet. What is the angle measure, or angle of depression, between the first bird and the bird watcher? © 2011 Jupiter Images Corporation Answer 40.8° 49.2° 30.2° 59.8°

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  1. pineapple31
    • 4 years ago
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  2. brinethery
    • 4 years ago
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    tan(x) = (49.6/57.4) (opp/adj) x = tan^-1(49.6/57.4) That's the inverse tangent. There should be an option on your calculator for that.

  3. brinethery
    • 4 years ago
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    Is that helping at all?

  4. pineapple31
    • 4 years ago
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    i don't have a calculator on me :/

  5. brinethery
    • 4 years ago
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    Does the teacher let you use calculators or did they mention a table you could use for looking up these values? B/c that's how they did it in the old days.

  6. brinethery
    • 4 years ago
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    Scientific calculator: http://web2.0calc.com/

  7. pineapple31
    • 4 years ago
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    yeah we can use it i just dont have one on me at the moment and i need the answer

  8. brinethery
    • 4 years ago
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    40.83 degrees The reverse of a tangent is referred to as both the inverse tangent and the arc tangent. So on a calculator, it will either show up as tan^-1, atan, or arctan. You also want to make sure that you mode is in degrees, not radians. Talk with your teacher if you're still unsure b/c it's important :-)

  9. brinethery
    • 4 years ago
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    http://www.ecalc.com/

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