SOLUTION: The angle of elevation of the top of the tower at a distance 40m from it is the compliment of the angle of elevation of the same tower a distance of 120m from it. Compute the heigh

Question 1170274: The angle of elevation of the top of the tower at a distance 40m from it is the compliment of the angle of elevation of the same tower a distance of 120m from it. Compute the height of the tower. Use sine or cosine law
Answer by ikleyn(52803) (Show Source): You can put this solution on YOUR website!
.

Watch attentively each my step (!)

tan(a) = 


tan(b) = 


a + b =   ====>  a =  - b


tan(a) =  =   ====>


 =  =   ====>


 = 40*120 = 40*40*3


h =  =  = 69.282 meters.    ANSWER

Solved and explained in all details.

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