An airplane over the Pacific Ocean sights an atoll at an 7° angle of depression. If the plane is 663 m above the water, how many kilometers is it from a point 663 m directly above the atoll? A. 5399.7 km B. 5.4 km C. 81.41 km D. 760.8 km

Question

An airplane over the Pacific Ocean sights an atoll at an 7° angle of depression. If the plane is 663 m above the water, how many kilometers is it from a point 663 m directly above the atoll?  A. 5399.7 km   B. 5.4 km   C. 81.41 km   D. 760.8 km

campbell_st · Answer

draw a diagram 

|dw:1366060169640:dw|

now all the information is shown. 

Just selesct the correct trig ratio and solve for the distance d

the answer you get will be in metres... so then divide it by 1000 to convert to kilometres.

anonymous · Answer

I still don't understand