Find the points on the given curve where the tangent line is horizontal or vertical. (Assume 0 ≤ 0 < π. Enter your answers as a comma-separated list of ordered pairs.) r = 5 cos(8) horizontal tangent vertical tangent Need Help? (r, 8) = , 1.81) (r, 8) = 3π 5 (4.1.81).(+) 4'2 Read It (0,0). ( ½, 2.31) Watch It X X

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