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23 August, 06:36

A person on a ship observed a lighthouse on the cliff, which is 830 metres away from the ship. The angle of elevation of the top of the lighthouse is 12°.

A. How far above sea level is the top of the lighthouse?

B. If the height of the lighthouse is 24m, how high is the cliff?

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  1. 23 August, 06:43
    0
    1660m

    Step-by-step explanation:

    here, angle of elevation = 12

    thus, angle of declination = 90-12=78

    sin 78 = 830/height

    0.5=830/height

    thus, height=1660m
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