Convert the polar coordinates (5, 6.1) to rectangular coordinates.

For polar coordinates, convert using x = r cos θ and y = r sin θ. With r = 5 and θ = 6.1 radians, x ≈ 5 cos(6.1) ≈ 4.92 and y ≈ 5 sin(6.1) ≈ −0.91. So the rectangular coordinates are (4.92, −0.91), choice C.

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