# Often asked: What is a secant line?

## What is a secant line in math?

A secant line, also simply called a secant, is a line passing through two points of a curve. In geometry, a secant line commonly refers to a line that intersects a circle at exactly two points (Rhoad et al. 1984, p. 429).

## What is the secant line in calculus?

A secant line is a straight line joining two points on a function. It is also equivalent to the average rate of change, or simply the slope between two points. The average rate of change of a function between two points and the slope between two points are the same thing.

## How do you find the secant line?

Tthe Equation of a Secant Line

1. Find two points on the secant line.
2. Find the slope of the line between the two points.
3. Plug one of your points and your slope into the point slope form of your line to obtain an equation of the line.

## Is a secant always a chord?

A secant is technically not a chord, but it contains a chord (the segment between the two red intersection points).

## What is Secant formula?

The formula for secant theta

Sec X = frac{Hypotenuse}{Adjacent Side} As we know there are six trigonometric functions and out of these, Secant, cotangent, and cosecant are hardly used.

## What is difference between secant and chord?

A straight line that intersects a circle in two points is called a secant line. A chord is the line segment that joins two distinct points of the circle.

## How do you find the slope of the secant line given two points?

Form the difference quotient f(x+Δx)−f(x)Δx, f ( x + Δ x ) − f ( x ) Δ x, which is the slope of a general secant line of the curve f throught the points P=(x,f(x)) P = ( x, f ( x ) ) and Q=(x+Δx,f(x+Δx)).

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## How many Secant can a circle have?

While in a circle, a secant will touch the circle in exactly two points and a chord is the line segment defined by these two points, that is the interval on a secant whose endpoints are these two points. So from the above definition, there can be infinite secants which can be drawn to the circle.

## What is the slope of a secant line?

A secant line has a slope equal to the average rate of change of the function between two points.

## How do you find the Tangentant and secant line?

A tangent line touches the curve at one point and has the same slope as the curve does at that point. A secant line intersects at 2 or more points and has a slope equal to the average rate of change between those points.

## How do you draw a secant line on a graph?

Two points determine a line. We select one point on the graph of y = f(x) by specifying a domain value a; the corresponding point on the graph has coordinates (a,f(a)). We can select another nearby point on the graph by choosing a (small) value of h.

## Why is it called a secant line?

In geometry, a secant of a curve is a line that intersects the curve at a minimum of two distinct points. The word secant comes from the Latin word secare, meaning to cut.

## How do you calculate chord?

The formula for the chord length is: 2rsin(theta/2) where r is the radius of the circle and theta is the angle from the centre of the circle to the two points of the chord.

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## Which line is called as chord?

A chord of a circle is a straight line segment whose endpoints both lie on a circular arc. A chord that passes through a circle’s center point is the circle’s diameter. The word chord is from the Latin chorda meaning bowstring.