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5 | (a) Evaluate arctan(-1) in radians and in degrees, using a calculator. (b) Then explain how you can evaluate arctan(-1) exactly, without using a

5 | (a) Evaluate arctan(-1) in radians and in degrees, using a calculator. (b) Then explain how you can evaluate arctan(-1) exactly, without using a calculator, by using the definition of the inverse tangent function. Give a careful, complete explanation, as if you were explaining it to a fellow student who doesn't understand it.

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