Calculate the sine of any angle in degrees or radians with step-by-step working.
The sine function returns the ratio of the opposite side to the hypotenuse in a right triangle. For any angle θ, sin(θ) ranges from −1 to 1. This calculator accepts both degrees and radians.
Sine definition
sin θ = opposite / hypotenuse
sin(30°) = 0.5. This is one of the standard angles: sin(0°)=0, sin(30°)=0.5, sin(45°)≈0.7071, sin(60°)≈0.8660, sin(90°)=1.
The sine function always returns a value between −1 and 1 inclusive, for any real angle input.