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°

Question

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°

anonymous · Answer

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anonymous · Answer

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.

anonymous · Answer

Is that helping at all?

anonymous · Answer

i don't have a calculator on me :/

anonymous · Answer

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.

anonymous · Answer

Scientific calculator: http://web2.0calc.com/

anonymous · Answer

yeah we can use it i just dont have one on me at the moment and i need the answer

anonymous · Answer

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 :-)

anonymous · Answer

http://www.ecalc.com/