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Answers: a = , b = (0, -1), c = C, d = 0
<u>Explanation:</u>
a) Add 2π until you get a positive value.
+
=
, which is located on the y-axis at 270°
b) Look at the Unit Circle to find the coordinates of = (0, -1)
c) cot = =
d) =
= 0
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Answer: 471.24
<u>Explanation:</u>
angular speed (w) =
= 4π radians/hour
linear speed (v) = r * w
=
= 150π meters/hour
≈ 471.24 meters/hour