Angle of depression from a to fire is 90-30=60 from east-west horizontal
angle of depression from b to fire is 90-42=48 from east-west horizontal
So the angle from fire adjacent to the east-west horizontal is 180-60-48=72
Now we can use the law of sines to solve for the distances...
sin72/12mi=sin48/A=sin60/B
A=12sin48/sin72=9.38mi
B=12sin60/sin72=10.93mi
Answer:
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Step-by-step explanation:
Answer:
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Observe Moon;s center on a Full Moon night from two places 100 km apart for parallax
θ
.. Then
α
= 100/6378 radian = 0.0156789 radian = 0.8983346 deg. The distance of the Moon then will be approximately 6378 sin(0.449167)/sin (
θ
/2). The other way about , if the distance is known to be 384000 km, theta is nearly 0.1492 deg = 54", nearly.. .
I think it might be the one who walked 60ft in 10 seconds