How do you tell whether the value of tan 90 degrees is positive, negative, zero or undefined?, Socratic

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How do you tell whether the value of tan 90 degrees is positive, negative, zero or undefined?, Socratic

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If [math]1/0=undefined[/math] and [math]2/0=undefined[/math] does that mean [math]1/0=2/0[/math] ? - Quora

How do you tell whether the value of tan 90 degrees is positive, negative, zero or undefined?, Socratic

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Why is the value of Cot(90) degree zero, when its a reciprocal of Tan(90) which is infinity? - Quora

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