# What is a tangent?

The study of trigonometric functions is included inschool curriculum and studied in the course "trigonometry." But, in spite of this, most of such notations as tangent, as well as sine, cosine and cotangent often frighten an adult, lead to a dead end, tk. in due course it is forgotten what these trigonometric functions denote and for what they are used.

## Notation of the concept

Proceeding from the foregoing, it is worth recalling thatsuch a tangent is a trigonometric function, depending on the values of the sine and cosine. Like most mathematical concepts, the word "tangent" comes from the Latin word, which means "contiguous; the one that applies. " The letters for the tangent are tg.

## Explanation

The definition of a tangent does not give a full idea of what it is. The main trigonometric property of a tangent is that it expresses the ratio of the sine of the angle (sin) to the cosine (cos) of the same angle.

If necessary, you can easily calculate the tangentAn acute angle that is in a right-angled triangle. Geometrically, this can be done as follows: the tangent, in this case, will show the ratio of the opposite leg to the adjacent leg of the right triangle.

When solving trigonometric problems, to facilitate their solution, you can use the Bradys tables.