A vertical flagstaff stands on a horizontal plane. From a point 200 m from its foot, the angel of elevation of its top is found to be 30 degree. Find the height of the flagstaff?
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Answer:
Height of a flagstaff (AB) = h m
BC = 100m
Angle of elevation = 45°
Tan 45 = P/b
1 = AB/BC
1 = h/100
h = 100
Height of a flagstaff is 100m.
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