Friday

April 25, 2014

April 25, 2014

Posted by **anonymous** on Sunday, May 27, 2012 at 4:35pm.

- trig -
**Henry**, Monday, May 28, 2012 at 8:03pmWe form a rt. triangle:

X = 6 meters = Hor.

Y = Ver. = Dist. from gnd to junction of wire and pole.

Z = Hyp. = Length of the wire.

A = Angle bet. gnd and wire.

B = Angle bet. pole and wire.

A + B = 90 Deg.

A = 3B.

3B + B = 90

B = 22.5 Deg.

A = 3B = 3*22.5 = 67.5 Deg.

Z*cosA = X

Z = X/cosA = 15.7 m.

tanA = Y/X = Y/6

Y = 6*tanA = 6*tan67.5 = 14.5 m.

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