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

Where LOB - segment OB straight; O (0, 0, 0); B (-2, 4, 5)

Where L - the arc of the curve ρ = 9sin2φ, 0 ≤ φ ≤ π / 4

Where L - the circle x2 + y2 = ax.

Where L - top half ellipse x = acost, y = bsint, «traversed" clockwise.

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