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).

Other related Trigonometry pages