# Quick Answer: Can A Tangent Line Be Vertical?

## Can a tangent line be horizontal?

A horizontal tangent line is a mathematical feature on a graph, located where a function’s derivative is zero.

Horizontal lines have a slope of zero.

Therefore, when the derivative is zero, the tangent line is horizontal..

## How do you find where a tangent line is horizontal?

To find the points at which the tangent line is horizontal, we have to find where the slope of the function is 0 because a horizontal line’s slope is 0. That’s your derivative. Now set it equal to 0 and solve for x to find the x values at which the tangent line is horizontal to given function.

## How do you find a parallel tangent line?

To be parallel, two lines must have the same slope. The slope of the tangent line at a point of the parabola is given by the derivative of y=x2−3x−5. This means that the question is asking at what point the derivative of the parabola will equal the slope of 3x−y=2.

## At what point is the tangent line parallel?

Two lines are parallel if the have the same slope. The slope of y = 2x is m = 2. The slope of the tangent to the curve at x = a is the derivative f (a).

## What is the slope of a vertical tangent line?

In mathematics, particularly calculus, a vertical tangent is a tangent line that is vertical. Because a vertical line has infinite slope, a function whose graph has a vertical tangent is not differentiable at the point of tangency.

## Where the tangent line is vertical?

Finding Vertical Tangents If the denominator of is equal to zero and the numerator is not zero, then the tangent is vertical. The points that satisfy the system x3 + y3 – 9xy = 0 and y2 – 3x = 0 are the points of the folium where the tangents may be vertical.

## Does a Cusp have a vertical tangent line?

A vertical tangent has the one-sided limits of the derivative equal to the same sign of infinity. … You have a case where the derivative exists, as you showed in your question. Therefore, it is neither a cusp nor a vertical tangent.

## How do you find the tangent line on a calculator?

How to Use the Tangent Line Calculator?Step 1: Enter the equation of the curve in the first input field and x value in the second input field.Step 2: Now click the button “Calculate” to get the output.Step 3: The slope value and the equation of the tangent line will be displayed in the new window.More items…•

## What is the tangent of a straight line?

Tangent, in geometry, straight line (or smooth curve) that touches a given curve at one point; at that point the slope of the curve is equal to that of the tangent. A tangent line may be considered the limiting position of a secant line as the two points at which it crosses the curve approach one another.