Q:
# What Is the "law of Tangents"?

The law of tangents states that for a triangle with sides a, b and c and corresponding angles A, B and C, (a - b)/(a + b) is equal to the tangent of (1/2[A - B])/(1/2[A + B]).

Continue ReadingThe law of tangents can be used when the length of two sides and the size of the angle in between them are known, such as the values for b, c and A. The law can also be used when the values of any two angles and one side are known, such as A, B and a. The law of tangents is a trigonometric function.

Learn more about Trigonometry-
Q:
## How Do You Find the Cosine of Pi?

A: The trigonometric functions sine, cosine and tangent calculate the ratio of two sides in a right triangle when given an angle in that triangle. To find the... Full Answer >Filed Under: -
Q:
## How Do You Find the Cos Inverse?

A: The basic trigonometric functions sine, cosine, and tangent give the ratio between two sides of a triangle with a given angle. The inverse trig functions f... Full Answer >Filed Under: -
Q:
## What Is the Definition of "plane Trigonometry"?

A: "Plane trigonometry" is a branch of mathematics that focuses on the relationship between the sides and angles of a triangle. Plane trigonometry builds upon... Full Answer >Filed Under: -
Q:
## What Is the Midline Theorem?

A: The midline theorem, formally known as Varignon's theorem, states that a parallelogram is formed when the midpoints of the sides of any convex quadrilatera... Full Answer >Filed Under: