# Sine (sin) Calculator

### Sine (sin) Calculator

Calculated sine() of the number

### sin() function

The sine function is a periodic function which is very important in trigonometry. The simplest way to understand the sine function is to use the unit circle. For a given angle measure θ , draw a unit circle on the coordinate plane and draw the angle centered at the origin, with one side as the positive x -axis.

This is an online free sin calculator. You can calculate value of sin() trignometric function easily using this tool.

### Important Abbreviations to remember

• SOH: Opposite / Hypotenuse (Sine)
• CAH: Adjacent / Hypotenuse (Cosine)
• TOA: Opposite / Adjacent (Tangent)

### Interactive animation of Sine & Cosine functions

Drag the red dot around to see how it affects the sine and cosine values below.

### Understanding the Main Trigonometric Functions

In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) are functions of an angle. They relate the angles of a triangle to the lengths of its sides. Degrees and Radians are units of measuring these angles. Degrees originated as an unit to measure how far constellations moved in a day (1 degree ~ 1 day of movement). Degrees measure angles by how far we tilted our heads(Observer's view point). Radians measure angles by distance traveled(Movers's view point).