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18 February, 21:27

Find the total length of guy wire needed to secure both sides of a 25ft TV antenna to a flat roof there is a 30 degree angle between the Mast and the guy wires. round to nearest hundredth.

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  1. 19 February, 00:42
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    So we are looking at three times the hypotenuse of a right triangle with an acute angle of 30 degrees, and the longer leg 25'.

    Each guy wire is therefore 25'/cos (30) = 28.8675'

    Most antenna have (minimum) three guy wires for stability, so total length

    L=3*28.8675=866.03 m.

    If the diagram shows other than 3 guy wires, multiply 28.8675 by the appropriate number accordingly.
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