Sine Calculator
Calculate sin of an angle in degrees, including negative angles and complete turns.
Formula
sin(θ); reduce by multiples of 360°, then multiply degrees by π/180
Sine ≈ sin(((30)-360×floor(((30)+180)÷360))×pi÷180)
How to use
- Enter an angle in degrees.
- Use a negative value for clockwise rotation.
- Read its sine, which has no unit.
Examples
- sin(30°) = 0.5; sin(−30°) = −0.5.
Frequently asked questions
What is sin 30°?
It is 1/2, or 0.5.
Can sine be negative?
Yes. Its values lie between −1 and 1.
Can I enter radians?
This form uses degrees. Convert radians to degrees first, or use the scientific calculator.
Sources
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