A man stranding on the deck of the ship which is 20 m above the sea level , observes the angle of elevation of a bird as 30° and the angle of depression of its reflection in the sea as 60°. find the height of the bird.
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Answer:
Tan 30 = x/ab
1/root3 = x/ ab
Ab = xroot3.
Tan60 = 20 + 20 + x/ab
Root3 = 40 + x/ ab
Ab = 40 + x/ root 3
40 + x/root3 = xroot3
40 + x = 3x
40 = 2x
X = 20
Height = 80m
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