Practice set 6.2A person is standing at a distance of 80m from a churc

1.	Practice set 6.2A person is standing at a distance of 80m from a church looking at its top.The angle of elevation is of 45Â°. Find the height of the church.From the top of a lighthouse, an observer looking at a ship makes angle ofdepression of 60Â°. If the height of the lighthouse is 90 metre, then find how farthe ship is from the lighthouse. (3-1.73)
Answer» hit like if you find it useful 2)tan∅ = AB/BC tan60° = 90/BC √3 = 90/BC BC×√3 = 90 BC = 90/√3 BC. = 90/1.73 BC = 52.023 m (approximate)___________________________________so ship 52.023 meter far from the light house.

Practice set 6.2A person is standing at a distance of 80m from a church looking at its top.The angle of elevation is of 45Â°. Find the height of the church.From the top of a lighthouse, an observer looking at a ship makes angle ofdepression of 60Â°. If the height of the lighthouse is 90 metre, then find how farthe ship is from the lighthouse. (3-1.73)

Answer»

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2)tan∅ = AB/BC

tan60° = 90/BC

√3 = 90/BC

BC×√3 = 90

BC = 90/√3

BC. = 90/1.73

BC = 52.023 m (approximate)___________________________________so ship 52.023 meter far from the light house.