a) after you make your sketch you should see that
cos A = 120/d
b) if d=1500
cosA = 120/1500 = .08
A = appr 5.4°
( here is what I did on my calculator .....
120
÷ 1500
=
2ndF
cos
=
to get 85.4114...
c) repeat the steps I showed you in b)
let me know what you got
An observer on the ground at point A watches a rocket ascend. The observer is 120 feet from the launch point B. As the rocket rises, the distance d from the observer to the rocket increases.
a. Express the measure of angle A in terms of d.
b. Find the measure of angle A if d = 1500 feet.
c. Find the measure of angle A if d = 2000 feet.
1 answer
1 answer