sin(): Sine of an Angle

sin() returns the vertical coordinate of an angle on the unit circle. It models oscillation, rotation, waves, and periodic motion; sin(0) is 0 and sin(π/2) is 1.

Radians and inverse use

Use radians consistently. Recover a principal angle with asin(), or use atan2() when coordinates determine the quadrant. Pair sin with cos() for circular motion.

Real sine values lie between −1 and 1. Normalize measured ratios before inverse trigonometry, and use abs() when checking amplitude magnitude.

Try Sin in Calcul.io

Start with one of the editable examples above, then replace its arguments with your own values. Keeping the function on a separate calculator line makes the input and result easy to compare. For a longer workflow, assign the result to a variable or reference that line in the next expression.

Check the shown signature before adding optional arguments, and use the related-function links to compare operations with similar purposes.

@1	sin(2)
@2	sin(pi / 4) ^ 2
@3	sin(90 deg)
@4	sin(30 deg)
@5	sin(0.2)^2 + cos(0.2)^2

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sin

sin(x)

sin(): Sine of an Angle

Radians and inverse use

Try Sin in Calcul.io