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Write the angle and select its type. The online sine calculator will instantly compute the sine trigonometric values in radians, π radians, or degrees.
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The online Sine Calculator helps you quickly determine the sine of any angle in degrees, radians, or π radians.
Learn how to calculate sine, plot sine graphs, and understand sine curves to solve trigonometric problems efficiently.
In a right-angled triangle, the sine function is defined as the ratio of the side opposite the angle to the hypotenuse.
With this online calculator, you don’t need to apply the formula manually—simply enter the relevant values.
Additionally, the CSC Calculator can compute the cosecant (csc) function for the same angle formats.
For a right-angled triangle:
sin(α) = opposite / hypotenuse
If the opposite side = 10 and hypotenuse = 6:
The sine function produces a repeating up-and-down curve known as a sine wave. It starts at 0, rises to 1, falls to -1, and repeats periodically:
| Degrees (°) | Radians | sin(x) |
|---|---|---|
| 0 | 0 | 0 |
| 30 | π/6 | 0.5 |
| 45 | π/4 | 0.7071 |
| 60 | π/3 | 0.8660 |
| 90 | π/2 | 1 |
| 120 | 2π/3 | 0.8660 |
| 135 | 3π/4 | 0.7071 |
| 150 | 5π/6 | 0.5 |
| 180 | π | 0 |
Use the Arcsin Calculator to find arcsin(x) in both degrees and radians.
Sine and cosine are used to solve triangles, determining side lengths and angles. Sine is used when two sides and an angle are known, while cosine is used for three sides or two sides with an included angle.
The word “sine” comes from the Latin translation of the Arabic word “jiba,” derived from the Sanskrit “jya-ardha.”
No. To define its inverse, the domain is restricted to 0 ≤ x ≤ π.
Yes. Sine is odd, meaning sin(-x) = -sin(x). Most trigonometric functions are neither strictly odd nor even.
This online Sine Calculator allows students and professionals to quickly find sine values without manually applying formulas, saving time and minimizing errors.
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