Submit Part C-Finding an unknown side when you know one other side and an angle

Question

Submit Part C-Finding an unknown side when you know one other side and an angle Figure In aviation, it is helpful for pilots to know the cloud ceiling, which is the distance between the ground and lowest cloud. The simplest way to measure this is by using a spotlight to shine a beam of light up at the clouds and where the beam hits the clouds. If the spotlight on the ground is 0.75 kn from the hangar door as shown in (Figure 3), what is the cloud ceiling? g the angle between the ground and 0.75 km km 20

Explanation / Answer

This is a triangle which base side is 0.75 km and a angle is 20 degree.

tan20 = a / 0.75

a = 0.2729 km

Now for tha biggest side

Cos20 = 0.75/b

b = 0.798 km

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