# How do you prove Tangent-Secant Theorem?

## How do you prove Tangent-Secant Theorem?

Product of the outside segment and whole secant equals the square of the tangent to the same point….Vocabulary.

Term Definition
Tangents Secant Segments Theorem If a tangent and a secant are drawn from a common point outside the circle (and the segments are labeled like the picture below), then a2=b(b+c).

What is the tangent rule?

Tangent Rule Explanation: The tangent rule states that the ratio of difference and sum of any two sides of a triangle is equal to the ratio of the tangent of half the difference and tangent of sum of the angles opposite to these sides.

How will you prove the theorems on a tangent and segments of a circle?

If a tangent segment and a secant segment are drawn to a circle from an exterior point, then the square of the measure of the tangent segment is equal to the product of the measures of the secant segment and its external secant segment.

### How do you prove theorem?

In order for a theorem be proved, it must be in principle expressible as a precise, formal statement. However, theorems are usually expressed in natural language rather than in a completely symbolic form—with the presumption that a formal statement can be derived from the informal one.

How do you calculate tangent angle?

Multiply both sides by the unknown x to get x tan 80 degrees = 39. Divide both sides by the tan 80 degrees to get. Simplify to get. The wire attaches to the ground about 6.88 feet from the base of the tower to form the 80-degree angle.

What is the tangent segment theorem?

The tangent-secant theorem describes the relation of line segments created by a secant and a tangent line with the associated circle.

## What is SEC in math?

The inverse secant function – arcsec. For every trigonometry function such as sec,there is an inverse function that works in reverse.

• Large and negative angles.
• Graph of the secant function.
• The derivative of sec (x) In calculus,the derivative of sec (x) is sec (x)tan (x).