sin cos tan and inverse in deg/rad.. Trigonometry Calculator is a free online tool from the ToolsRift Math Calculators collection. It runs entirely in your browser — nothing to install, no signup, and your data never leaves your device.
Pick a function, choose degrees or radians, enter the angle or ratio, and the trig value is calculated instantly.
Yes — choose your angle unit and the calculator interprets and returns values accordingly.
Arcsin, arccos and arctan, which return the angle for a given ratio.
Arcsin and arccos accept values between −1 and 1; outside that range the result is undefined.