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

Is tan 90 undefined or infinity? - Quora

We know an acute angle of a right triangle is used to develop the formulas of trigonometry unabling these to work for other angles. In sinA, A is an acute angle of

What is the formula of tan(90 - A)? - Quora

What does “cosecant” mean in math? - Quora

Why does the the unit circle in trigonometry change sign after pi to -pi and so on? Why doesn't it continue to 2pi? - Quora

Why is tan 90°= Infinity? - Quora

How do you evaluate tan 90 ?

What is the detailed analysis of the graph of tan(1/x)? - Quora