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 is the graph of r=5^ ((sin θ) ^15)? - Quora

What would happen if we chose the angle in a tangent function to be negative? - Quora

Why sine theta is the y coordinate of a point in the unit circle ? - Quora

Who is angle? - Quora

Why is the range of the arcsin function restricted only within 90<=x<=270 degrees? - Quora

How to know that cos ((4/3) pi) = -1/2? How can the length of the adjacent be negative - Quora

How to find the sin of any angle - Quora

What is meant by cos theta in physics? - Quora

The point (-4, 3) is on the terminal arm of angle theta in standard position. What are the primary trigonometric ratios of this angle? - Quora

Why is tan 270 undefined? - Quora