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The portion of the line 4x + 5y = 20 in the first quadrant is trisected by the lines, L 1 and L 2 passing through the origin. The tangent of an angle between the lines L 1 and L 2 is:

1. 5 2
2. 5 8
3. 41 25
4. 41 30

Correct answer: 41 30

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