# Trigonometric Ratios

In a right triangle, the following trigonometric ratios can be defined:

### Sine

The **sine** of the angle B is the ratio between the length of the **opposite side** and the **hypotenuse** of the triangle.

It is denoted by **sin B**.

### Cosine

The **cosine** of the angle B is the **ratio** between the length of the **adjacent side** and the **hypotenuse** of the triangle.

It is denoted by **cos B**.

### Tangent

The **tangent** of the angle B is the **ratio** between the length of the **opposite side** and the **adjacent side** of the triangle.

It is denoted by **tan B**.

### Cosecant

The **cosecant** of angle B is the **inverse** of the **sine** of B.

It is denoted by ** csc B**.

### Secant

The **secant** of angle B is the **inverse** of the **cosine** of B.

It is denoted by **sec B**.

### Cotangent

The **cotangent** of the angle B is the **inverse** of the **tangent** of B.

It is denoted by **cot B**.

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