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

Where L - triangle circuit with vertices A (-1, 0), B (1, 0), C (0, 1) with the positive direction of the bypass.

Where LAB - line segment joining the points A (1, 1, 1) and B (2, 2, 2).

Where L - circumference x = 3cost, y = 3sint.

Where LAB - right semicircle arc of x2 + y2 = a2 from point A (0, -a) to point B (0, a).

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