Asked by C

How far apart would the top of the drawbridge be when both sides are open, if the angle of elevation of the drawbridge was 20°, to the nearest hundredth? (Extra info: distance inbetween is labeled "x")
Answered by bobpursley
if the length of each drawbridge is L/2 (the bridge then is L across)
so, if x is the distance between the tips, then x+2((Lcos20) /2)=L
or x= L-Lcos20 or L(1-cos20)
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