An observer (O) spots a bird flying at a 55° angle from a line drawn horizontal to its nest. If the distance from the observer (O) to the bird (B) is 15,000 ft., how far is the bird (B) from its nest (N)? Round to the nearest whole number. These are the choices: A) 8,604 Feet B) 12,287 Feet C) 18,366 Feet D) 21,422 Feet

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An observer (O) spots a bird flying at a 55° angle from a line drawn horizontal to its nest. If the distance from the observer (O) to the bird (B) is 15,000 ft., how far is the bird (B) from its nest (N)? Round to the nearest whole number. These are the choices: A) 8,604 Feet B) 12,287 Feet C) 18,366 Feet D) 21,422 Feet

Mathematics
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I'd like to learn this please, not just get the answer! :)
I know the functions by the way.

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Other answers:

angle = 55 degrees side adjacent to the angle (A) = x hypotenuse (H) = 15,000 so which trig ratio do we require?
The cosine function?
by trig ratio i mean trig function
yes
Okay, so the first step would be: cos55 = x/15,000 ??
that correct
Okay, then you'd do cos 55 into the calculator which gives you: 0.57357. Then I'd multiple 15,000 into 0.57357?
yep!
Which will be: 8603.55 which rounds to 8604 which is A. :)
yes
Okay, thank you haha! :)
Looks like you hardly need any help champ!
well done
Wanted to make sure I was correct lol.
I don't want to appear pedantic but its more correct to say 'multiply by' than 'multiply into' - this threw me at first because you can say 'divide into'.

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