tacolover1022 tacolover1022

09-01-2020
Mathematics

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A lifeguard on the shore in a chair that is 6 ft above the ground. She sees a swimmer at an angle of depression of 10°. About how far away from shore is the swimmer? Round your answer to the answer to the nearest foot.

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sqdancefan sqdancefan

09-01-2020

Answer:

34 ft

Step-by-step explanation:

The mnemonic SOH CAH TOA reminds you of the relationship between adjacent and opposite sides of a right triangle and the trig function of the associated angle. Here, the relevant relation is ...

Tan = Opposite/Adjacent

tan(10°) = (height of lifeguard)/(distance from shore)

Then the distance from shore is ...

distance from shore = (height of lifeguard)/tan(10°) ≈ (6 ft)/(0.17633)

distance from shore ≈ 34 ft

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