Why don't tan [math]90^{\circ}[/math] and tan [math]270^{\circ}[/math] exist? - Quora

Answer (1 of 11): What is a "tangent"? It is a line that intersects a circle at only one poimt. Then what is the "TAN" function? It is a function, that returns the slope of the tangent line for a given angle relative to a zero angle. With the "slope" of the tangent line and the point of intersect

What happens to the slope ratio when the angle is 0 90? - Quora

Why are the tangents for 90 and 270 degrees undefined?

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Is tan 90 undefined or infinity? - Quora

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If 0°≤x≤90° and cos x-0.5=0, what does x=? - Quora

Why tan 90 is Undefined C4 Communication and Basic Concept

What is a rigorous proof of why the adjacent of a right angle triangle is [ math]h cos heta [/math]? - Quora

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Why is tan 90°= Infinity? - Quora