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17 September, 22:51

Grace is standing 14 feet from a lighthouse and Kelly is standing 12 feet from Grace. The angle that Grace looks up to see the top of the lighthouse is 45°. The angle that Kelly looks up to see the top of the lighthouse is y°.

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  1. 18 September, 01:59
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    The height of the lighthouse is:

    h = 14 ft (same as the distance from Kelly to a lighthouse).

    tan y = 14 / (14 + 12) = 14 / 26 = 0.5384615

    y = tan^ (-1) 0.5384615 = 28.3°

    Answer: y = 28.3°
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