Mathematics, 02.08.2019 19:00 theojw

Fast ! sandra wants to evaluate 2cot(-9pi/2). herwork is shown below. what did she do wrong? 2cot(-9pi/2)=2cot(9pi/2) 2cot(-9pi/2)=2cot(pi/2) 2cot(-9pi/2)=2(0) 2cot(-9pi/2)=0

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Fast ! sandra wants to evaluate 2cot(-9pi/2). herwork is shown below. what did she do wrong? 2cot(...

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