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# FAQ: What is a secant?

## What is a secant 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 difference between secant and chord?

In a secant, the line intersects the circle at two points.

Difference between a secant and a chord.

Secant Chord
It is drawn from outside the circle It lies within the circle

## What is secant in circle?

In geometry, a secant of a curve is a line that intersects the curve at a minimum of two distinct points. In the case of a circle, a secant will intersect the circle at exactly two points.

## 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 equal to?

The secant of x is 1 divided by the cosine of x: sec x = 1 cos x, and the cosecant of x is defined to be 1 divided by the sine of x: csc x = 1 sin x.

## How do you do Secant lines?

To do this, we follow these steps:

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.

## Can a secant be a ray?

A secant is a line, ray, or line segment that intersects a circle in two places.

## How many Secant can a circle have?

If you are taking only one point,which is external to the circle then two tangent and infinite secant can be drawn. If you are taking the whole circle, then infinite tangent and infinite secant can be drawn on it.

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## Can a secant go through the center of a circle?

In case of a circle, a secant is a line that intersects the circle exactly twice. The line segment joining the two points where the secant intersects the circle is a chord. If the secant passes through the centre of the circle, the line segment joining the two points of intersection is a diameter.

## How do you find a secant?

The secant of an angle in a right triangle is the value found by dividing length of the hypotenuse by the length of the side adjacent the given angle. The secant ratio is the reciprocal of the cosine ratio.

## How do you find the secant line of a circle?

A secant is a line that intersects a circle in exactly two points. When a tangent and a secant, two secants, or two tangents intersect outside a circle then the measure of the angle formed is one-half the positive difference of the measures of the intercepted arcs.

## How do you find the secant angle?

The secant of an angle in a right triangle is the value found by dividing length of the hypotenuse by the length of the side adjacent the given angle. The secant ratio is the reciprocal of the cosine ratio.

## What is the formula of chord?

c is the angle subtended at the center by the chord.

Chord Length Formula.

Formula to Calculate Length of a Chord
Chord Length Using Perpendicular Distance from the Center Chord Length = 2 × √(r2 − d2)
Chord Length Using Trigonometry Chord Length = 2 × r × sin(c/2)