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OpenStudy (anonymous):
Values of the trigonometric functions that are defined for theta=-270 degrees. cot(-270 degrees) a. -1 b. undefined c. 1 d. 0
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OpenStudy (anonymous):
\[\cot(-270) = -\cot(270) = -\cot(360-90) = -\cot(90) = -(0) = 0\]
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