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Two buildings of different heights stand 15mts apart.From the foot of the taller building,the top of the shorter is seen at an angle of elevation 45,and from the foot of the shorter building,top of the taller is seen at an angle of elevation 70. Draw the rough sketch. find the height of the shorter,taller buildings. (sin 70=0.94,cos 70=0.342,tan 40=2.747)