The graphs of this straight line and the one in the previous example are identical. So let's say that this point right over here, this x value, is x sub-- well, this is pronounced x naught, or x sub 0 is just x naught-- and when x is x0 for this line, y is y0.

Page 18 of 20. The numbers: Draw a right triangle with three points A, B and C. Hints help you try the next step on your own.

## Secant Line

In abstract mathematics, the points connected by a secant line can be either real or complex conjugate imaginary. Practice finding secant by solving this problem.

Understand that to calculate secant you need only find the cosine of an angle and the relationship that exists between them. Use the slope to determine a second point on the line and connect the two points with a straight line. By using the Pythagorean theorem and knowing how to find cosine, sine and tangent in a right triangle, you can derive or calculate secant.

Well, what's the average rate of change? Here is the graph of the curve and its secant line that passes thru the points: In geometry, a secant line commonly refers to a line that intersects a circle at exactly two points Rhoad et al.

## Slope of a line secant to a curve

And what is it equal to? How to Calculate the Secant. And let's say that this is another point on a curve right over here, x2.

Main content. Or another way of thinking about it is, this is the average rate of change for the curve between x equals x1, and x is equal to x2. So our change in y over this interval is equal to y2 minus y1, and our change in x is going to be equal to x2 minus x1. So this right over here, this has a positive slope.

How will we eventually get the tools, so that we can figure out the instantaneous rate of change, not just the average? Replace the point: So we don't have the tools yet. As the two points are brought together or, more precisely, as one is brought towards the other , the secant line tends to a tangent line. What is the Law of Cosines Formula? Current time: