Arcsin Calculator
Compute the inverse sine ($\arcsin$) angle value instantly with our interactive real-time projection Unit Circle.
Enter Value
Angle Output
30.00°
What is the Arcsin Calculator?
The Arcsin (Inverse Sine) Calculator is an inverse trigonometric function tool. It takes the mathematical ratio of the Opposite side to the Hypotenuse of a right triangle, and calculates the exact internal angle that produced it.
How It Works (Formula)
The Arcsine function reverses the standard Sine function. If $\sin(\theta)$ gives you a ratio $x$ (between -1 and 1), then taking the inverse sine of $x$ gives you back the original angle $\theta$ in degrees or radians.
$$ \theta = \arcsin(x) \iff \sin(\theta) = x $$
The inverse functional relationship between Sine and Arcsine.
How to Use It
Enter the numerical ratio (which must be between -1 and 1). Click calculate, and the tool will instantly run the inverse algorithm, outputting the corresponding angle in both Degrees and Radians.