# Sine Calculator

In order to calculate sin(x) on the calculator:

1. Enter the input angle.
2. Select angle type of degrees (°) or radians (rad) in the combo box.
3. Press the = button to calculate the result.

### Inverse sine calculator

Enter the sine value, select degrees (°) or radians (rad) and press the = button:

Here we discuss list of online math calculators that help us for doing calculation easily.

### Sine Calculator

Sine Calculator is a free online tool that displays the sine angle of the right triangle. Online sine calculator tool makes the calculation faster and it displays the sine angle in a fraction of seconds.

In order to calculate sin(x) on the calculator:

1. Enter the input angle.

2. Select angle type of degrees (°) or radians (rad) in the combo box.

3. Press the = button to calculate the result.

What is Sine function?

Sine is one of the three most common trigonometric functions (others are cosine and tangent, as well as secant, cosecant and cotangent). The abbreviation of sine is sin e.g. sin(30°). Most common and well known sine definition is based on right-angled triangle. Let's start with nomenclature of triangle sides which will be useful in further steps. As the picture on the right shows, we can name the sides of a right triangle as:

1. adjacent side - the shorter adjacent side of the angle of interest (in this case, angle α). This side is adjacent to both the angle of interest and the right angle.

2. opposite side - merely the side opposite to the angle of interest.

3. hypotenuse - the opposite side to the right angle, it's always the longest side in the right triangle.