1. Calculate the data line integrals (1-4)

Where LOBA - a broken OBA; O (0, 0); B (2, 0); A (2, 1)

Where LAB - arc astroid x = cos3t, y = sin3t, concluded between points A (1, 0) and B (0, 1).

Where L - curve (x2 + y2) 2 = a2 (x2 - y2), x ≥ 0.

Where LAB - line segment that connects point A (2, 0, -2) and B (-2, 0, 2).

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