## pineapple31 3 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°

1. pineapple31

2. brinethery

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

Is that helping at all?

4. pineapple31

i don't have a calculator on me :/

5. brinethery

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

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

7. pineapple31

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

8. brinethery

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