Sin 30 value: The sine of a 30°

The sine of a 30° angle, written as sin 30°, gives the ratio of the length of the side opposite a 30° angle to the hypotenuse in a right-angled triangle . You’ll find this value applied in areas such as triangle solving, unit circle problems, and physics. Sin 30 degrees is the value of sine trigonometric function for an angle equal to 30 degrees. The value of sin 30° is 1/2 or 0.5. How to Find the Value of Sin 30 Degrees? Use our sin (x) calculator to find the exact value of sine of 30 degrees - sin ( 30 °) - or the sine of any angle in degrees and in radians. Sin 30 degrees is a trigonometric ratio that lies on the positive x-axis so the value of Sin 30 degrees will always be positive. To be exact, the value of Sin 30 degrees is 1/2 .