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Sine Calculator

Calculate the sine of an angle

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

The sine of an angle is the ratio of the length of the side opposite that angle to the hypotenuse in a right triangle, or equivalently the y-coordinate of a point on the unit circle at that angle. This calculator accepts the angle in either degrees or radians and converts internally (radians = degrees × π/180) before evaluating, since most math libraries and calculators compute sine in radians natively.

It's a foundational operation in trigonometry homework, but also in real engineering: sine drives the vertical component of projectile motion, the voltage waveform of AC electricity, sound wave synthesis, and the rotation matrices used in computer graphics and robotics.

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