The wire and the post form a rt. triangle with the gnd.
L = Hyp. = Length of wire.
X = 7 m.
A = 56.67o
L = X/Cos A
A guy wire from the top of a telephone post touches the ground at a point 7 meters from the foot of the post. If the wire and the post make an angle of 56°40', find the length of the guy wire.
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